Replaced deprecated tslint with eslint and updated dependencies

Author: piotrwitek

playground/.eslintrc

@@ -0,0 +1,7 @@
+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint'],
+  extends: ['react-app', 'prettier'],
+  rules: { 'import/no-anonymous-default-export': 0 },
+};