build: add and configure prettier formatter

.eslintrc.json

@@ -3,24 +3,36 @@
         "es6": true,
         "shared-node-browser": true
     },
-    "extends": "eslint:recommended",
+    "extends": [
+        "plugin:prettier/recommended"
+    ],
     "parserOptions": {
         "ecmaVersion": 2018,
         "sourceType": "module"
     },
+    "plugins": [
+        "prettier"
+    ],
     "rules": {
+        "prettier/prettier": "error",
         "quotes": [
             "error",
             "single",
-            { "allowTemplateLiterals": true }
+            {
+                "allowTemplateLiterals": true
+            }
         ],
         "semi": [
             "error",
             "never"
         ],
         "no-console": [
             "error",
-            { "allow": [ "warn" ] }
+            {
+                "allow": [
+                    "warn"
+                ]
+            }
         ],
         "valid-jsdoc": [
             "warn"

.prettierrc

@@ -0,0 +1,6 @@
+{
+  "printWidth": 120,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "all"
+}

package.json

@@ -34,11 +34,14 @@
     "chai": "4.2.0",
     "cz-conventional-changelog": "2.1.0",
     "documentation": "11.0.1",
-    "eslint": "5.16.0",
+    "eslint": "6.0.1",
+    "eslint-config-prettier": "6.0.0",
+    "eslint-plugin-prettier": "3.1.0",
     "husky": "2.4.1",
     "istanbul": "0.4.5",
     "mocha": "6.1.4",
     "nyc": "14.1.1",
+    "prettier": "1.18.2",
     "rollup": "1.15.6",
     "rollup-plugin-babel": "4.3.2",
     "rollup-plugin-commonjs": "10.0.0",
@@ -48,6 +51,8 @@
     "sinon-chai": "3.3.0",
     "standard-version": "6.0.1",
     "tslint": "5.17.0",
+    "tslint-config-prettier": "1.18.0",
+    "tslint-plugin-prettier": "2.0.1",
     "typescript": "3.5.2"
   },
   "directories": {