fix plugin activation crash (thx to vsc integration tests)

Author: zardoy

typescript/src/completionsAtPosition.ts

@@ -341,7 +341,7 @@ const arrayMoveItemToFrom = <T>(array: T[], originalItem: ArrayPredicate<T>, ite
 }
 
 const patchBuiltinMethods = (c: GetConfig, languageService: ts.LanguageService, isCheckedFile: boolean) => {
-    if (isTs5 && (isCheckedFile || !c('additionalIncludeExtensions').length)) return
+    if (isTs5() && (isCheckedFile || !c('additionalIncludeExtensions').length)) return
 
     let addFileExtensions: string[] | undefined
     const getAddFileExtensions = () => {

typescript/src/getPatchedNavTree.ts

@@ -87,7 +87,7 @@ const getPatchedNavModule = (additionalFeatures: AdditionalFeatures): { getNavig
         patches,
         returnModuleCode,
         skipStartMarker = false,
-    }: PatchData = !isTs5
+    }: PatchData = !isTs5()
         ? {
               markerModuleStart: 'var NavigationBar;',
               markerModuleEnd: '(ts.NavigationBar = {}));',
@@ -115,7 +115,7 @@ const getPatchedNavModule = (additionalFeatures: AdditionalFeatures): { getNavig
     }
     const getModuleString = () => `module.exports = (ts, getNameFromJsxTag) => {\n${lines.join('\n')}\nreturn ${returnModuleCode}}`
     let moduleString = getModuleString()
-    if (isTs5) {
+    if (isTs5()) {
         const { languageService } = createLanguageService({
             'main.ts': moduleString,
         })

typescript/src/utils.ts

@@ -118,7 +118,7 @@ export const boostExistingSuggestions = (entries: ts.CompletionEntry[], predicat
 }
 
 // semver: can't use compare as it incorrectly works with build postfix
-export const isTs5 = semver.major(ts.version) >= 5
+export const isTs5 = () => semver.major(ts.version) >= 5
 
 // Workaround esbuild bundle modules
 export const nodeModules = __WEB__