Export lib as Vue Plugin

[jtommy]

@Remeic I changed the export way of your library as Vue Plugin. As you can see it's a breaking change (i didn't update Readme) but i think it's the better way to share a custom library in order to add new features (components, directives, mixins, ...) in the future. For CDN the plugin is automatically added to Vue instance.

[codecov[bot]]

Codecov Report

Merging #8 into master will decrease coverage by 1.44%. The diff coverage is 98.55%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
- Coverage     100%   98.55%   -1.45%     
==========================================
  Files           1        2       +1     
  Lines          66       69       +3     
==========================================
+ Hits           66       68       +2     
- Misses          0        1       +1

Impacted Files	Coverage Δ
src/highlighter.js	100% <100%> (ø)
src/index.js	75% <75%> (-25%)	:arrow_down:

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[Remeic]

Hi @jtommy ( Ciao!! ), thanks for contributing, you know how write test for the new index.js? Because the code coverage is decreased

Thanks again

[jtommy]

I added an example but it doesn't cover all code (for example: window branch)

[Remeic]

Perfect, thanks Walter! 🚀