fix(deep-linking): ensure the deepLinkDir ends in path.sep

Author: danbucholtz

src/deep-linking/util.ts

@@ -1,4 +1,4 @@
-import { basename, dirname, extname, relative } from 'path';
+import { basename, dirname, extname, relative, sep } from 'path';
 
 import {
   ArrayLiteralExpression,
@@ -88,7 +88,7 @@ export function filterTypescriptFilesForDeepLinks(fileCache: FileCache): File[]
 }
 
 export function isDeepLinkingFile(filePath: string) {
-  const deepLinksDir = getStringPropertyValue(Constants.ENV_VAR_DEEPLINKS_DIR);
+  const deepLinksDir = getStringPropertyValue(Constants.ENV_VAR_DEEPLINKS_DIR) + sep;
   const moduleSuffix = getStringPropertyValue(Constants.ENV_NG_MODULE_FILE_NAME_SUFFIX);
   const result = extname(filePath) === '.ts' && filePath.indexOf(moduleSuffix) === -1 && filePath.indexOf(deepLinksDir) >= 0;
   return result;