chore: setup eslint + typescript

.babelrc

@@ -1,3 +1,7 @@
 {
-    "presets": ["@babel/preset-env"]
+  "presets": ["@babel/preset-env", "@babel/preset-typescript"],
+  "plugins": [
+    "@babel/proposal-class-properties",
+    "@babel/proposal-object-rest-spread"
+  ]
 }

.eslintrc

@@ -1,3 +1,18 @@
 {
-  "extends": ["wesbos"]
+  "extends": ["wesbos"],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "parserOptions": {
+    "project": "./tsconfig.json"
+  },
+  "rules": {
+    "no-console": "error"
+  },
+  "settings": {
+    "import/resolver": {
+      "node": {
+        "extensions": [".js", ".ts"]
+      }
+    }
+  }
 }

package.json

@@ -42,6 +42,11 @@
     "@babel/cli": "7.4.3",
     "@babel/core": "7.4.3",
     "@babel/preset-env": "7.4.3",
+    "@babel/preset-typescript": "7.3.3",
+    "@types/chai": "4.1.7",
+    "@types/mocha": "5.2.6",
+    "@types/sinon": "7.0.11",
+    "@types/sinon-chai": "3.2.2",
     "babel-eslint": "9.0.0",
     "dotenv": "7.0.0",
     "eslint": "5.16.0",
@@ -57,7 +62,9 @@
     "microbundle": "0.11.0",
     "npm-run-all": "4.1.5",
     "prettier": "1.16.4",
-    "rimraf": "2.6.3"
+    "rimraf": "2.6.3",
+    "ts-node": "8.0.3",
+    "typescript": "3.3.3"
   },
   "dependencies": {
     "parse-dotenv": "2.0.1"

tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "commonjs",
+    "declaration": true,
+    "strict": true,
+    "esModuleInterop": true
+  },
+  "include": ["lib/**/*.ts"]
+}