Add .sail.yml and remove travis

Author: Kadi Kraman

.sail.yml

@@ -0,0 +1,19 @@
+tasks:
+  build:
+    image: 'node:carbon'
+    command:
+      - yarn
+    args:
+      - install
+  lint:
+    image: 'node:carbon'
+    command:
+      - yarn
+    args:
+      - lint
+  test:
+    image: 'node:carbon'
+    command:
+      - yarn
+    args:
+      - test

.travis.yml

@@ -4,8 +4,7 @@
 <strong>React native bridge for AppAuth - an SDK for communicating with OAuth2 providers</strong>
 <br><br>
 
-[![Build Status](https://travis-ci.org/FormidableLabs/react-native-app-auth.svg?branch=master)](https://travis-ci.org/FormidableLabs/react-native-app-auth)
-[![npm version](https://badge.fury.io/js/react-native-app-auth.svg)](https://badge.fury.io/js/react-native-app-auth)
+[![npm package version](https://badge.fury.io/js/react-native-app-auth.svg)](https://badge.fury.io/js/react-native-app-auth)
 
 #### This is the API documentation for `react-native-app-auth >= 3.0.`