Merge pull request #966 from dxw/renovate/pg-1.x-lockfile

Update dependency pg to v1.6.2

Author: renovate[bot]

Gemfile.lock

@@ -215,9 +215,9 @@ GEM
     parser (3.3.8.0)
       ast (~> 2.4.1)
       racc
-    pg (1.6.1-arm64-darwin)
-    pg (1.6.1-x86_64-darwin)
-    pg (1.6.1-x86_64-linux)
+    pg (1.6.2-arm64-darwin)
+    pg (1.6.2-x86_64-darwin)
+    pg (1.6.2-x86_64-linux)
     popper_js (2.11.8)
     pp (0.6.2)
       prettyprint