Bump middleman from 4.5.0 to 4.5.1 (#136)

Bumps [middleman](https://github.com/middleman/middleman) from 4.5.0 to 4.5.1.
- [Changelog](https://github.com/middleman/middleman/blob/main/CHANGELOG.md)
- [Commits](https://github.com/middleman/middleman/commits)

---
updated-dependencies:
- dependency-name: middleman
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -17,7 +17,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.2.3)
-    contracts (0.17)
+    contracts (0.16.1)
     dotenv (2.8.1)
     erubis (2.7.0)
     execjs (2.9.1)
@@ -39,23 +39,23 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     memoist (0.16.2)
-    middleman (4.5.0)
+    middleman (4.5.1)
       coffee-script (~> 2.2)
       haml (>= 4.0.5)
       kramdown (>= 2.3.0)
-      middleman-cli (= 4.5.0)
-      middleman-core (= 4.5.0)
+      middleman-cli (= 4.5.1)
+      middleman-core (= 4.5.1)
     middleman-autoprefixer (3.0.0)
       autoprefixer-rails (~> 10.0)
       middleman-core (>= 4.0.0)
-    middleman-cli (4.5.0)
-      thor (>= 0.17.0, < 2.0)
-    middleman-core (4.5.0)
+    middleman-cli (4.5.1)
+      thor (>= 0.17.0, < 1.3.0)
+    middleman-core (4.5.1)
       activesupport (>= 6.1, < 7.1)
       addressable (~> 2.4)
       backports (~> 3.6)
       bundler (~> 2.0)
-      contracts (~> 0.13)
+      contracts (~> 0.13, < 0.17)
       dotenv
       erubis
       execjs (~> 2.0)
@@ -120,7 +120,7 @@ GEM
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     temple (0.10.3)
-    thor (1.3.0)
+    thor (1.2.2)
     tilt (2.0.11)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)