Fix lookbehinds (for Linguist compatibility) (#80)

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Co-authored-by: Lukas Neubert <[email protected]>

Author: DecimalTurn

syntaxes/vba.tmGrammar.yml

@@ -45,7 +45,7 @@ repository:
 
   functions:
     name: entity.name.function.vba
-    match: (?i:\b(?<=(Call|Function|Sub)\s)[a-zA-Z][a-zA-Z0-9_]*\b)(?=\(\)?)
+    match: (?i:\b(?:(?<=Call )|(?<=Function )|(?<=Sub ))[a-zA-Z][a-zA-Z0-9_]*\b)(?=\(\)?)
 
   numbers:
     patterns:
@@ -72,7 +72,7 @@ repository:
     patterns:
       - name: support.type.builtin.vba
         match: (?i)\b(Any|Byte|Boolean|Currency|Collection|Date|Double|Integer|Long(Long|Ptr)?|Object|Single|String|Variant)\b
-      - match: (?i)(?<=\s+As\s+)([a-zA-Z]+)
+      - match: (?i)(?<= As )([a-zA-Z]+)
         captures:
           1:
             name: support.type