Adding prettier and linter

.babelrc

@@ -1,5 +1,3 @@
 {
-	"presets": [
-		"@babel/preset-env"
-	]
-}
+  "presets": ["@babel/preset-env"]
+}

.eslintrc

@@ -0,0 +1,4 @@
+{
+  "extends": ["important-stuff"],
+  "parser": "@babel/eslint-parser"
+}

.prettierignore

@@ -0,0 +1 @@
+lib

package.json

@@ -5,12 +5,19 @@
   "main": "lib/single-spa-preact.js",
   "scripts": {
     "prepublishOnly": "yarn build",
+    "lint": "eslint src",
+    "format": "prettier --write .",
     "build": "rimraf lib && babel src --out-dir lib --source-maps"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/single-spa/single-spa-preact.git"
   },
+  "husky": {
+    "hooks": {
+      "pre-commit": "pretty-quick --staged && yarn lint"
+    }
+  },
   "keywords": [
     "single",
     "page",
@@ -31,9 +38,16 @@
   },
   "homepage": "https://github.com/single-spa/single-spa-preact#readme",
   "devDependencies": {
-    "@babel/cli": "^7.6.2",
-    "@babel/core": "^7.6.2",
-    "@babel/preset-env": "^7.6.2",
-    "rimraf": "^3.0.0"
+    "@babel/cli": "^7.10.5",
+    "@babel/core": "^7.11.1",
+    "@babel/eslint-parser": "^7.11.3",
+    "@babel/preset-env": "^7.11.0",
+    "eslint": "^7.7.0",
+    "eslint-config-important-stuff": "^1.1.0",
+    "eslint-plugin-prettier": "^3.1.4",
+    "husky": "^4.2.5",
+    "prettier": "^2.0.5",
+    "pretty-quick": "^2.0.1",
+    "rimraf": "^3.0.2"
   }
 }