Fix typescript mimetype

This commit ...

1. adds support for explicit typescript mime type
2. uses typescript by default in script tags

Syntaxes/HTML (Astro).sublime-syntax

@@ -20,6 +20,8 @@ variables:
 
   astro_component_char: '[^/?!\s<>=]'
 
+  typescript_mime_type: (?:(?:text|application)/(?:ts|typescript))
+
 contexts:
 
   prototype:
@@ -174,9 +176,14 @@ contexts:
 
   script-type-decider:
     - meta_prepend: true
+    - match: (?i)(?={{typescript_mime_type}}{{unquoted_attribute_break}}|'{{typescript_mime_type}}'|"{{typescript_mime_type}}")
+      set:
+        - script-typescript
+        - tag-type-attribute-meta
+        - tag-generic-attribute-value
     - match: (?=>|''|"")
       set:
-        - script-javascript
+        - script-typescript
         - tag-type-attribute-meta
         - tag-generic-attribute-value
 

tests/syntax_test_script.astro

@@ -125,7 +125,7 @@
 //              ^ punctuation.separator.key-value.html
 //               ^^^^^^^^^^^^^^^^^ string.quoted.double.html
 //                                  ^^^^ comment.block.html punctuation.definition.comment.begin.html
-//                                      ^ source.js.embedded.html
+//                                      ^ source.ts.embedded.html
 
     var foo = 100;
 // <- source.ts.embedded.html - source.ts source.ts
@@ -134,7 +134,7 @@
 //     ^^^ source.ts.embedded.html keyword.operator - comment
 
     --> </script>
-// ^ source.js.embedded.html - source.ts source.ts
+// ^ source.ts.embedded.html - source.ts source.ts
 //  ^^^^^^^^^^^^^^ - source.ts
 //     ^ - meta.tag - comment
 //      ^^^^^^^^^ meta.tag