build: enable optional chaining/nullish coalescing, use @jedwards1211/eslint-config-typescript

Author: jedwards1211

.babelrc.js

@@ -5,6 +5,8 @@ module.exports = function(api) {
     '@babel/plugin-proposal-export-default-from',
     '@babel/plugin-proposal-export-namespace-from',
     '@babel/plugin-proposal-object-rest-spread',
+    '@babel/plugin-proposal-optional-chaining',
+    '@babel/plugin-proposal-nullish-coalescing-operator',
   ]
   const presets = [
     [

.eslintrc

@@ -1,13 +1,6 @@
 {
   "extends": [
-    "@jedwards1211/eslint-config",
-    "eslint-config-prettier",
-    "plugin:@typescript-eslint/eslint-recommended",
-    "plugin:@typescript-eslint/recommended"
-  ],
-  "parser": "@typescript-eslint/parser",
-  "plugins": ["@typescript-eslint/eslint-plugin"],
-  "env": {
-    "es6": true
-  }
+    "@jedwards1211/eslint-config-typescript",
+    "eslint-config-prettier"
+  ]
 }

package.json

@@ -86,7 +86,9 @@
     "@babel/plugin-proposal-class-properties": "^7.1.0",
     "@babel/plugin-proposal-export-default-from": "^7.0.0",
     "@babel/plugin-proposal-export-namespace-from": "^7.0.0",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.4.4",
     "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
+    "@babel/plugin-proposal-optional-chaining": "^7.6.0",
     "@babel/plugin-syntax-dynamic-import": "^7.0.0",
     "@babel/plugin-transform-runtime": "^7.1.0",
     "@babel/preset-env": "^7.1.6",
@@ -95,13 +97,10 @@
     "@commitlint/cli": "^6.0.2",
     "@commitlint/config-conventional": "^6.0.2",
     "@jedwards1211/commitlint-config": "^1.0.0",
-    "@jedwards1211/eslint-config": "^2.0.0",
+    "@jedwards1211/eslint-config-typescript": "^1.0.0",
     "@types/chai": "^4.2.0",
     "@types/mocha": "^5.2.7",
     "@types/node": "^12.12.6",
-    "@typescript-eslint/eslint-plugin": "^2.6.1",
-    "@typescript-eslint/parser": "^2.6.1",
-    "@typescript-eslint/typescript-estree": "^2.6.1",
     "babel-eslint": "^10.0.1",
     "babel-plugin-istanbul": "^5.1.0",
     "chai": "^4.2.0",

src/index.spec.ts

@@ -1,5 +1,7 @@
 /* eslint-env mocha */
 
 describe('test setup', () => {
-  it('works', () => {})
+  it('works', () => {
+    // fill me out!
+  })
 })