style: Added ESlint and prettier for linters.

Added ESlint and prettier with airbnb config and hust precommit hook to lint on commit.

#36, #38

.eslintrc

@@ -0,0 +1,7 @@
+{
+    "extends": ["airbnb", "prettier"],
+    "plugins": ["prettier"],
+    "rules": {
+        "prettier/prettier": ["error"]
+    }
+}

.prettierignore

@@ -0,0 +1,4 @@
+
+package.json
+package-lock.json
+lib/

package.json

@@ -15,11 +15,23 @@
     "@types/crypto-js": "^3.1.33",
     "@types/jest": "^23.1.1",
     "@types/uuid": "^3.0.0",
+    "eslint": "^5.12.1",
+    "eslint-config-airbnb": "^17.1.0",
+    "eslint-config-prettier": "^3.6.0",
+    "eslint-plugin-prettier": "^3.0.1",
+    "husky": "^1.3.1",
     "jest": "^23.1.0",
     "mock-socket": "^7.1.0",
+    "prettier": "^1.16.1",
+    "pretty-quick": "^1.10.0",
+    "semantic-release": "^15.13.3",
     "ts-jest": "^22.4.6",
-    "typescript": "^2.3.4",
-    "semantic-release": "^15.13.3"
+    "typescript": "^2.3.4"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "pretty-quick --staged"
+    }
   },
   "scripts": {
     "test": "jest --env=jsdom",