switch from tslint to eslint

This also deduplicates glob because tslint-consistent-codestyle
was using version 7 of glob and mocha is using version 8.

Author: dotnetCarpenter

eslint.config.js

@@ -0,0 +1,7 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+);