Update pygments to 2.3.1

[pyup-bot]

This PR updates Pygments from 1.6 to 2.3.1.

Changelog

2.3.1

-------------
(released Dec 16, 2018)

- Updated lexers:

* ASM (PR784)
* Chapel (PR735)
* Clean (PR621)
* CSound (PR684)
* Elm (PR744)
* Fortran (PR747)
* GLSL (PR740)
* Haskell (PR745)
* Hy (PR754)
* Igor Pro (PR764)
* PowerShell (PR705)
* Python (PR720, 1299, PR715)
* SLexer (PR680)
* YAML (PR762, PR724)

- Fix invalid string escape sequences
- Fix `FutureWarning` introduced by regex changes in Python 3.7

2.3.0

-------------
(released Nov 25, 2018)

- Added lexers:

* Fennel (PR783)
* HLSL (PR675)

- Updated lexers:

* Dockerfile (PR714)

- Minimum Python versions changed to 2.7 and 3.5
- Added support for Python 3.7 generator changes (PR772)
- Fix incorrect token type in SCSS for single-quote strings (1322)
- Use `terminal256` formatter if `TERM` contains `256` (PR666)
- Fix incorrect handling of GitHub style fences in Markdown (PR741, 1389)
- Fix `%a` not being highlighted in Python3 strings (PR727)

2.2.0

-------------
(released Jan 22, 2017)

- Added lexers:

* AMPL
* TypoScript (1173)
* Varnish config (PR554)
* Clean (PR503)
* WDiff (PR513)
* Flatline (PR551)
* Silver (PR537)
* HSAIL (PR518)
* JSGF (PR546)
* NCAR command language (PR536)
* Extempore (PR530)
* Cap'n Proto (PR595)
* Whiley (PR573)
* Monte (PR592)
* Crystal (PR576)
* Snowball (PR589)
* CapDL (PR579)
* NuSMV (PR564)
* SAS, Stata (PR593)

- Added the ability to load lexer and formatter classes directly from files
with the `-x` command line option and the `lexers.load_lexer_from_file()`
and `formatters.load_formatter_from_file()` functions. (PR559)

- Added `lexers.find_lexer_class_by_name()`. (1203)

- Added new token types and lexing for magic methods and variables in Python
and PHP.

- Added a new token type for string affixes and lexing for them in Python, C++
and Postgresql lexers.

- Added a new token type for heredoc (and similar) string delimiters and
lexing for them in C++, Perl, PHP, Postgresql and Ruby lexers.

- Styles can now define colors with ANSI colors for use in the 256-color
terminal formatter. (PR531)

- Improved the CSS lexer. (1083, 1130)

- Added "Rainbow Dash" style. (PR623)

- Delay loading `pkg_resources`, which takes a long while to import. (PR690)

2.1.3

-------------
(released Mar 2, 2016)

- Fixed regression in Bash lexer (PR563)

2.1.2

-------------
(released Feb 29, 2016)

- Fixed Python 3 regression in image formatter (1215)
- Fixed regression in Bash lexer (PR562)

2.1.1

-------------
(relased Feb 14, 2016)

- Fixed Jython compatibility (1205)
- Fixed HTML formatter output with leading empty lines (1111)
- Added a mapping table for LaTeX encodings and added utf8 (1152)
- Fixed image formatter font searching on Macs (1188)
- Fixed deepcopy-ing of Token instances (1168)
- Fixed Julia string interpolation (1170)
- Fixed statefulness of HttpLexer between get_tokens calls
- Many smaller fixes to various lexers

2.1

-----------
(released Jan 17, 2016)

- Added lexers:

* Emacs Lisp (PR431)
* Arduino (PR442)
* Modula-2 with multi-dialect support (1090)
* Fortran fixed format (PR213)
* Archetype Definition language (PR483)
* Terraform (PR432)
* Jcl, Easytrieve (PR208)
* ParaSail (PR381)
* Boogie (PR420)
* Turtle (PR425)
* Fish Shell (PR422)
* Roboconf (PR449)
* Test Anything Protocol (PR428)
* Shen (PR385)
* Component Pascal (PR437)
* SuperCollider (PR472)
* Shell consoles (Tcsh, PowerShell, MSDOS) (PR479)
* Elm and J (PR452)
* Crmsh (PR440)
* Praat (PR492)
* CSound (PR494)
* Ezhil (PR443)
* Thrift (PR469)
* QVT Operational (PR204)
* Hexdump (PR508)
* CAmkES Configuration (PR462)

- Added styles:

* Lovelace (PR456)
* Algol and Algol-nu (1090)

- Added formatters:

* IRC (PR458)
* True color (24-bit) terminal ANSI sequences (1142)
 (formatter alias: "16m")

- New "filename" option for HTML formatter (PR527).

- Improved performance of the HTML formatter for long lines (PR504).

- Updated autopygmentize script (PR445).

- Fixed style inheritance for non-standard token types in HTML output.

- Added support for async/await to Python 3 lexer.

- Rewrote linenos option for TerminalFormatter (it's better, but slightly
different output than before) (1147).

- Javascript lexer now supports most of ES6 (1100).

- Cocoa builtins updated for iOS 8.1 (PR433).

- Combined BashSessionLexer and ShellSessionLexer, new version should support
the prompt styles of either.

- Added option to pygmentize to show a full traceback on exceptions.

- Fixed incomplete output on Windows and Python 3 (e.g. when using iPython
Notebook) (1153).

- Allowed more traceback styles in Python console lexer (PR253).

- Added decorators to TypeScript (PR509).

- Fix highlighting of certain IRC logs formats (1076).

2.0.2

-------------
(released Jan 20, 2015)

- Fix Python tracebacks getting duplicated in the console lexer (1068).

- Backquote-delimited identifiers are now recognized in F (1062).

2.0.1

-------------
(released Nov 10, 2014)

- Fix an encoding issue when using ``pygmentize`` with the ``-o`` option.

2.0

-----------
(released Nov 9, 2014)

- Default lexer encoding is now "guess", i.e. UTF-8 / Locale / Latin1 is
tried in that order.

- Major update to Swift lexer (PR410).

- Multiple fixes to lexer guessing in conflicting cases:

* recognize HTML5 by doctype
* recognize XML by XML declaration
* don't recognize C/C++ as SystemVerilog

- Simplified regexes and builtin lists.

2.0rc1

--------------
(released Oct 16, 2014)

- Dropped Python 2.4 and 2.5 compatibility.  This is in favor of single-source
compatibility between Python 2.6, 2.7 and 3.3+.

- New website and documentation based on Sphinx (finally!)

- Lexers added:

* APL (969)
* Agda and Literate Agda (PR203)
* Alloy (PR355)
* AmbientTalk
* BlitzBasic (PR197)
* ChaiScript (PR24)
* Chapel (PR256)
* Cirru (PR275)
* Clay (PR184)
* ColdFusion CFC (PR283)
* Cryptol and Literate Cryptol (PR344)
* Cypher (PR257)
* Docker config files
* EBNF (PR193)
* Eiffel (PR273)
* GAP (PR311)
* Golo (PR309)
* Handlebars (PR186)
* Hy (PR238)
* Idris and Literate Idris (PR210)
* Igor Pro (PR172)
* Inform 6/7 (PR281)
* Intel objdump (PR279)
* Isabelle (PR386)
* Jasmin (PR349)
* JSON-LD (PR289)
* Kal (PR233)
* Lean (PR399)
* LSL (PR296)
* Limbo (PR291)
* Liquid (977)
* MQL (PR285)
* MaskJS (PR280)
* Mozilla preprocessors
* Mathematica (PR245)
* NesC (PR166)
* Nit (PR375)
* Nix (PR267)
* Pan
* Pawn (PR211)
* Perl 6 (PR181)
* Pig (PR304)
* Pike (PR237)
* QBasic (PR182)
* Red (PR341)
* ResourceBundle (1038)
* Rexx (PR199)
* Rql (PR251)
* Rsl
* SPARQL (PR78)
* Slim (PR366)
* Swift (PR371)
* Swig (PR168)
* TADS 3 (PR407)
* Todo.txt todo lists
* Twig (PR404)

- Added a helper to "optimize" regular expressions that match one of many
literal words; this can save 20% and more lexing time with lexers that
highlight many keywords or builtins.

- New styles: "xcode" and "igor", similar to the default highlighting of
the respective IDEs.

- The command-line "pygmentize" tool now tries a little harder to find the
correct encoding for files and the terminal (979).

- Added "inencoding" option for lexers to override "encoding" analogous
to "outencoding" (800).

- Added line-by-line "streaming" mode for pygmentize with the "-s" option.
(PR165)  Only fully works for lexers that have no constructs spanning
lines!

- Added an "envname" option to the LaTeX formatter to select a replacement
verbatim environment (PR235).

- Updated the Makefile lexer to yield a little more useful highlighting.

- Lexer aliases passed to ``get_lexer_by_name()`` are now case-insensitive.

- File name matching in lexers and formatters will now use a regex cache
for speed (PR205).

- Pygments will now recognize "vim" modelines when guessing the lexer for
a file based on content (PR118).

- Major restructure of the ``pygments.lexers`` module namespace.  There are now
many more modules with less lexers per module.  Old modules are still around
and re-export the lexers they previously contained.

- The NameHighlightFilter now works with any Name.* token type (790).

- Python 3 lexer: add new exceptions from PEP 3151.

- Opa lexer: add new keywords (PR170).

- Julia lexer: add keywords and underscore-separated number
literals (PR176).

- Lasso lexer: fix method highlighting, update builtins. Fix
guessing so that plain XML isn't always taken as Lasso (PR163).

- Objective C/C++ lexers: allow "" prefixing any expression (871).

- Ruby lexer: fix lexing of Name::Space tokens (860) and of symbols
in hashes (873).

- Stan lexer: update for version 2.4.0 of the language (PR162, PR255, PR377).

- JavaScript lexer: add the "yield" keyword (PR196).

- HTTP lexer: support for PATCH method (PR190).

- Koka lexer: update to newest language spec (PR201).

- Haxe lexer: rewrite and support for Haxe 3 (PR174).

- Prolog lexer: add different kinds of numeric literals (864).

- F lexer: rewrite with newest spec for F 3.0 (842), fix a bug with
dotted chains (948).

- Kotlin lexer: general update (PR271).

- Rebol lexer: fix comment detection and analyse_text (PR261).

- LLVM lexer: update keywords to v3.4 (PR258).

- PHP lexer: add new keywords and binary literals (PR222).

- external/markdown-processor.py updated to newest python-markdown (PR221).

- CSS lexer: some highlighting order fixes (PR231).

- Ceylon lexer: fix parsing of nested multiline comments (915).

- C family lexers: fix parsing of indented preprocessor directives (944).

- Rust lexer: update to 0.9 language version (PR270, PR388).

- Elixir lexer: update to 0.15 language version (PR392).

- Fix swallowing incomplete tracebacks in Python console lexer (874).

Links

• PyPI: https://pypi.org/project/pygments
• Changelog: https://pyup.io/changelogs/pygments/
• Homepage: http://pygments.org/