Bump mdl from 0.12.0 to 0.13.0 (#164)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alexander Köplinger <alex.koeplinger@outlook.com>

.markdownlint.json

@@ -15,5 +15,8 @@
     "MD007": false,
     "MD030": false,
     "MD032": false,
-    "MD046": false
+    "MD046": false,
+    "MD055": false,
+    "MD056": false,
+    "MD057": false
 }

Gemfile.lock

@@ -15,7 +15,7 @@ GEM
       fiber-annotation
       io-event (~> 1.1)
       timers (~> 4.1)
-    chef-utils (18.1.0)
+    chef-utils (18.3.0)
       concurrent-ruby
     coffee-script (2.4.1)
       coffee-script-source
@@ -229,7 +229,7 @@ GEM
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    mdl (0.12.0)
+    mdl (0.13.0)
       kramdown (~> 2.3)
       kramdown-parser-gfm (~> 1.1)
       mixlib-cli (~> 2.1, >= 2.1.1)
@@ -265,7 +265,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rouge (3.26.0)
     ruby-rc4 (0.1.5)
     ruby2_keywords (0.0.5)

markdownlint-config.rb

@@ -43,3 +43,6 @@
 exclude_rule 'MD007' # Unordered list indentation
 exclude_rule 'MD030' # Spaces after list markers
 exclude_rule 'MD032' # Lists should be surrounded by blank lines
+exclude_rule 'MD055' # Table row doesn't begin/end with pipes
+exclude_rule 'MD056' # Table has inconsistent number of columns
+exclude_rule 'MD057' # Table has missing or invalid header separation (second row)