Add handlebars, Glimmer & GraphQL

Author: josemarluedke

README.md

@@ -77,6 +77,9 @@ language tree (see
 - `html`
 - `svelte`
 - `vue`
+- `handlebars`
+- `glimmer`
+- `graphql`
 
 This means that in any filetype, if the given languages are injected, this 
 plugin should detect them and correctly set the `commentstring`. For example, 

lua/ts_context_commentstring/internal.lua

@@ -23,6 +23,9 @@ M.config = {
   html = '<!-- %s -->',
   svelte = '<!-- %s -->',
   vue = '<!-- %s -->',
+  handlebars = '{{! %s }}',
+  glimmer = '{{! %s }}',
+  graphql = '# %s',
 
   -- Languages that can have multiple types of comments
   tsx = {