Enable prefer-const in the eslint config (#15)

JustinBeckwith · alexander-fenster · commit 3233862b7313 · 2018-09-20T12:31:28.000-07:00
diff --git a/packages/google-cloud-asset/.eslintrc.yml b/packages/google-cloud-asset/.eslintrc.yml
@@ -12,3 +12,4 @@ rules:
   eqeqeq: error
   no-warning-comments: warn
   no-var: error
+  prefer-const: error
