Enable no-var in eslint (#238)

JustinBeckwith · alexander-fenster · commit ca732765e4eb · 2018-09-18T10:35:05.000-07:00
diff --git a/core/common/.eslintrc.yml b/core/common/.eslintrc.yml
@@ -11,3 +11,4 @@ rules:
   block-scoped-var: error
   eqeqeq: error
   no-warning-comments: warn
+  no-var: error
