HVG always / never + CI update (#322)

* HVG always / never

(cherry picked from commit 7f37aee)

* Make never / always optional

(cherry picked from commit 11bbc9a)

* Try updated CI

(cherry picked from commit e39572e)

* Fix scrubblet link

(cherry picked from commit 88feff8)

* Adds styler

(cherry picked from commit 6cee614)

* Make styler executable

(cherry picked from commit c8da52b)

* Use main instead of development

(cherry picked from commit 4494e90)

* Delete large test files

.github/styler.R

@@ -0,0 +1,36 @@
+#!/usr/bin/env Rscript
+
+library("argparse")
+library("styler")
+
+parser <- ArgumentParser(description = "Call styler")
+parser$add_argument("dir",
+    metavar = "DIR", type = "character",
+    help = "File to parse"
+)
+parser$add_argument("--dry",
+    choices = c("off", "on"), default = "on"
+)
+args <- parser$parse_args()
+
+file_info <- file.info(args$dir)
+is_directory <- file_info$isdir
+
+if (is_directory) {
+    captured_output <- capture.output({
+        result <- style_dir(args$dir, indent_by = 4, dry = args$dry, recursive = TRUE)
+    })
+} else {
+    captured_output <- capture.output({
+        result <- style_file(args$dir, indent_by = 4, dry = args$dry)
+    })
+}
+
+n <- nrow(subset(result, changed == TRUE))
+if (n > 0) {
+    if (args$dry == "off") {
+        print(paste("Changed", n, "files"))
+    } else {
+        stop(paste("Linting failed for", n, "files"))
+    }
+}