enh(nsis) Update language string pattern (#3420)

Author: idleberg

CHANGES.md

@@ -8,6 +8,7 @@ Grammars:
 - fix(fsharp) Highlight operators, match type names only in type annotations, support quoted identifiers, and other smaller fixes. [Melvyn Laïly][]
 - enh(java) add `sealed` and `non-sealed` keywords (#3386) [Bradley Mackey][]
 - enh(nsis) Update defines pattern to allow `!` (#3417) [idleberg][]
+- enh(nsis) Update language strings pattern to allow `!` (#3420) [idleberg][]
 - fix(clojure) Several issues with Clojure highlighting (#3397) [Björn Ebbinghaus][]
   - fix(clojure) `comment` macro catches more than it should (#3395)
   - fix(clojure) `$` in symbol breaks highlighting

src/languages/nsis.js

@@ -167,7 +167,7 @@ export default function(hljs) {
   const LANGUAGES = {
     // $(language_strings)
     className: 'variable',
-    begin: /\$+\([\w^.:-]+\)/
+    begin: /\$+\([\w^.:!-]+\)/
   };
 
   const PARAMETERS = {