Merge pull request #3084 from TracksApp/dependabot/bundler/pg-1.5.9

Bump pg from 1.5.7 to 1.5.9

Author: ZeiP

Gemfile.lock

@@ -192,7 +192,7 @@ GEM
     parser (3.3.5.0)
       ast (~> 2.4.1)
       racc
-    pg (1.5.7)
+    pg (1.5.9)
     puma (6.4.3)
       nio4r (~> 2.0)
     racc (1.8.1)