fix: accept file names beginning with a period (#1005)

* fix: fix name validation regex to accept file names beginning with a period

* Update src/node-to-fsa/__tests__/NodeFileSystemDirectoryHandle.test.ts

---------

Co-authored-by: Gareth Jones <Jones258@Gmail.com>

src/node-to-fsa/__tests__/NodeFileSystemDirectoryHandle.test.ts

@@ -303,6 +303,12 @@ onlyOnNode20('NodeFileSystemDirectoryHandle', () => {
       });
     }
 
+    test('accepts file names beginning with a .', async () => {
+      const { dir } = setup({ '.hidden': 'contents' });
+      const fileHandle = await dir.getFileHandle('.hidden');
+      expect(fileHandle).toBeInstanceOf(NodeFileSystemFileHandle);
+    });
+
     test('can retrieve a child file', async () => {
       const { dir } = setup({ file: 'contents', subdir: null });
       const subdir = await dir.getFileHandle('file');

src/node-to-fsa/util.ts

@@ -18,7 +18,7 @@ export const basename = (path: string, separator: string) => {
   return lastSlashIndex === -1 ? path : path.slice(lastSlashIndex + 1);
 };
 
-const nameRegex = /^(\.{1,2})|(.*(\/|\\).*)$/;
+const nameRegex = /^(\.{1,2})$|^(.*([\/\\]).*)$/;
 
 export const assertName = (name: string, method: string, klass: string) => {
   const isInvalid = !name || nameRegex.test(name);