Add ESM and CommonJS sources to Standard Selector

I think that `.cjs` and `.mjs` are much more common now and should be included in the standard selector

Author: rgant

linter.py

@@ -36,7 +36,7 @@
 logger = logging.getLogger('SublimeLinter.plugin.eslint')
 
 
-STANDARD_SELECTOR = 'source.js, source.jsx'
+STANDARD_SELECTOR = 'source.js, source.jsx, source.mjs, source.cjs'
 PLUGINS = {
     'eslint-plugin-html': 'text.html',
     'eslint-plugin-json': 'source.json',