feat(rule): preferred alternatives - open-source

Author: naiyerasif

Prim/PreferredAlternatives.yml

@@ -8,3 +8,4 @@ swap:
   0-day: zero-day
   12 am: midnight
   12 pm: noon
+  open-source: open source

test/fixtures/PreferredAlternatives/test.md

@@ -8,3 +8,6 @@ Our online support is available until 12 am.
 
 <!-- 12 pm -->
 Please submit your report by 12 pm tomorrow.
+
+<!-- open-source -->
+I contributed a new feature to an open-source project.

test/snapshots/PreferredAlternatives.log

@@ -1,3 +1,4 @@
 test.md:4:36:Prim.PreferredAlternatives:Prefer using 'Zero-day' over '0-day'.
 test.md:7:39:Prim.PreferredAlternatives:Prefer using 'Midnight' over '12 am'.
-test.md:10:30:Prim.PreferredAlternatives:Prefer using 'Noon' over '12 pm'.
+test.md:10:30:Prim.PreferredAlternatives:Prefer using 'Noon' over '12 pm'.
+test.md:13:35:Prim.PreferredAlternatives:Prefer using 'open source' over 'open-source'.