Bump haml from 4.0.7 to 5.1.2

Bumps [haml](https://github.com/haml/haml) from 4.0.7 to 5.1.2.
- [Release notes](https://github.com/haml/haml/releases)
- [Changelog](https://github.com/haml/haml/blob/master/CHANGELOG.md)
- [Commits](haml/haml@4.0.7...v5.1.2)

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -22,7 +22,7 @@ gem 'rails-i18n'
 gem 'mysql2', '~> 0.4.0' # for compatibility with rails 4
 gem 'prawn'
 gem 'prawn-table'
-gem 'haml', '~> 4.0' # some breaking changes in version 5, remove this line again when fixed
+gem 'haml', '~> 5.1' # some breaking changes in version 5, remove this line again when fixed
 gem 'haml-rails'
 gem 'kaminari'
 gem 'simple_form'

Gemfile.lock

@@ -221,7 +221,8 @@ GEM
       rails (>= 4.0.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    haml (4.0.7)
+    haml (5.1.2)
+      temple (>= 0.8.0)
       tilt
     haml-rails (1.0.0)
       actionpack (>= 4.0.1)
@@ -509,6 +510,7 @@ GEM
     sqlite3 (1.3.13)
     sqlite3-ruby (1.3.3)
       sqlite3 (>= 1.3.3)
+    temple (0.8.2)
     term-ansicolor (1.2.2)
       tins (~> 0.8)
     therubyracer (0.12.3)
@@ -598,7 +600,7 @@ DEPENDENCIES
   foodsoft_printer!
   foodsoft_wiki!
   gaffe
-  haml (~> 4.0)
+  haml (~> 5.1)
   haml-rails
   hashie (~> 3.4.6)
   i18n-js (~> 3.0.0.rc8)