Changing node-version default to be latest LTS (12.x)

Author: fishcharlie

action.yml

@@ -7,7 +7,7 @@ inputs:
     default: 'false'
   node-version:
     description: 'Version Spec of the version to use.  Examples: 10.x, 10.15.1, >=10.15.0'
-    default: '10.x'
+    default: '12.x'
   registry-url:
     description: 'Optional registry to set up for auth. Will set the registry in a project level .npmrc and .yarnrc file, and set up auth to read in from env.NODE_AUTH_TOKEN'
   scope: