ESLint v8 support (#246)

* Upgrade eslint and typescript eslint

* Add temporary Jest resolver

* Update tests for new ESLint export

export-maps-resolver.js

@@ -0,0 +1,12 @@
+// TODO: Remove workaround for https://github.com/facebook/jest/issues/9771
+// after Jest v28 is released.
+// eslint-disable-next-line import/no-extraneous-dependencies, @typescript-eslint/no-var-requires
+const enhancedResolve = require('enhanced-resolve');
+
+const resolver = enhancedResolve.create.sync({
+  conditionNames: ['require', 'node', 'default'],
+  extensions: ['.js', '.json'],
+  mainFields: ['exports', 'main', 'require'],
+});
+
+module.exports = (request, options) => resolver(options.basedir, request);

jest.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  resolver: './export-maps-resolver.js',
+};