Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/ansi-regex/index.d.ts

@@ -0,0 +1,37 @@
+declare namespace ansiRegex {
+	interface Options {
+		/**
+		Match only the first ANSI escape.
+
+		@default false
+		*/
+		onlyFirst: boolean;
+	}
+}
+
+/**
+Regular expression for matching ANSI escape codes.
+
+@example
+```
+import ansiRegex = require('ansi-regex');
+
+ansiRegex().test('\u001B[4mcake\u001B[0m');
+//=> true
+
+ansiRegex().test('cake');
+//=> false
+
+'\u001B[4mcake\u001B[0m'.match(ansiRegex());
+//=> ['\u001B[4m', '\u001B[0m']
+
+'\u001B[4mcake\u001B[0m'.match(ansiRegex({onlyFirst: true}));
+//=> ['\u001B[4m']
+
+'\u001B]8;;https://github.com\u0007click\u001B]8;;\u0007'.match(ansiRegex());
+//=> ['\u001B]8;;https://github.com\u0007', '\u001B]8;;\u0007']
+```
+*/
+declare function ansiRegex(options?: ansiRegex.Options): RegExp;
+
+export = ansiRegex;