Warn if older version of Vue is used #1181
Description
What problem does this feature solve?
This helps us find if a website uses older version of Vue and helps us inform them, or if that's ours, upgrade update Vue version
Just show the Vue-Devtools logo and a small warning logo in bottom-right position.
This is been inspired by react devtools
What does the proposed API look like?
See the implementation of react devtools