(fix) correct syntax highlighting when numbers in attr name

#625

Author: dummdidumm

packages/svelte-vscode/syntaxes/svelte.tmLanguage.json

@@ -705,7 +705,7 @@
         },
         "tag-generic-attribute": {
             "name": "entity.other.attribute-name.html",
-            "match": "(?<=[^=])\\b([a-zA-Z\\-_:]+)"
+            "match": "(?<=[^=])\\b([a-zA-Z][a-zA-Z0-9$\\-_:]*)"
         },
         "tag-id-attribute": {
             "name": "meta.attribute-with-value.id.html",
@@ -790,7 +790,7 @@
             ]
         },
         "tag-moustaches": {
-            "begin": "\\b([a-zA-Z\\-_:]+)=(\"|')",
+            "begin": "\\b([a-zA-Z][a-zA-Z0-9$\\-_:]*)=(\"|')",
             "beginCaptures": {
                 "1": {
                     "name": "entity.other.attribute-name.html"
@@ -832,7 +832,7 @@
             ]
         },
         "tag-moustaches-raw": {
-            "begin": "\\b([a-zA-Z\\-_:]+)=({)",
+            "begin": "\\b([a-zA-Z][a-zA-Z0-9$\\-_:]*)=({)",
             "beginCaptures": {
                 "1": {
                     "name": "entity.other.attribute-name.html"