fix(@schematics/angular): don't visit dot folders when running migrations

Author: alan-agius4

packages/schematics/angular/migrations/update-10/rename-browserslist-config.ts

@@ -18,7 +18,7 @@ function* visit(directory: DirEntry): IterableIterator<string> {
   }
 
   for (const path of directory.subdirs) {
-    if (path === 'node_modules') {
+    if (path === 'node_modules' || path.startsWith('.')) {
       continue;
     }
 

packages/schematics/angular/migrations/update-10/solution-style-tsconfig.ts

@@ -39,7 +39,7 @@ function* visitExtendedJsonFiles(directory: DirEntry): IterableIterator<[string,
   }
 
   for (const path of directory.subdirs) {
-    if (path === 'node_modules') {
+    if (path === 'node_modules' || path.startsWith('.')) {
       continue;
     }
 

packages/schematics/angular/migrations/update-8/update-lazy-module-paths.ts

@@ -29,7 +29,7 @@ function* visit(directory: DirEntry): IterableIterator<ts.SourceFile> {
   }
 
   for (const path of directory.subdirs) {
-    if (path === 'node_modules') {
+    if (path === 'node_modules' || path.startsWith('.')) {
       continue;
     }