chore: add Travis CI tests

.travis.yml

@@ -0,0 +1,10 @@
+language: node_js
+node_js:
+- 10
+sudo: false
+script: yarn test
+before_script:
+- yarn prettier:check
+branches:
+  only:
+  - master

README.md

@@ -1,6 +1,7 @@
 <div align="center">
   <br><b>Emoji Mart</b> is a Slack-like customizable<br>emoji picker component for React
   <br><a href="https://missive.github.io/emoji-mart">Demo</a> • <a href="https://github.com/missive/emoji-mart/releases">Changelog</a>
+  <br><a href="https://travis-ci.org/nolanlawson/emoji-mart"><img src="https://travis-ci.org/nolanlawson/emoji-mart.svg?branch=master" alt="Build Status"></a>
   <br><br><img width="338" alt="picker" src="https://user-images.githubusercontent.com/436043/43481399-d9b60acc-94d3-11e8-9b3b-e5f2db8f0bd1.png">
   <br><br><a title="Team email, team chat, team tasks, one app" href="https://missiveapp.com"><img width="30" alt="Missive | Team email, team chat, team tasks, one app" src="https://user-images.githubusercontent.com/436043/32532559-0d15ddfc-c400-11e7-8a24-64d0157d0cb0.png"></a>
   <br>Brought to you by the <a title="Team email, team chat, team tasks, one app" href="https://missiveapp.com">Missive</a> team

package.json

@@ -49,7 +49,7 @@
     "inflection": "1.10.0",
     "jest": "^23.0.0",
     "mkdirp": "0.5.1",
-    "prettier": "1.11.1",
+    "prettier": "^1.16.4",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",
     "react-test-renderer": "^16.8.4",
@@ -76,6 +76,7 @@
     "storybook": "start-storybook -p 6006",
     "build-storybook": "build-storybook",
     "prettier": "prettier --write \"{src,scripts}/**/*.js\"",
+    "prettier:check": "prettier --check \"{src,scripts}/**/*.js\"",
     "prepare": "npm run build:dist"
   },
   "size-limit": [

src/components/category.js

@@ -210,8 +210,7 @@ export default class Category extends React.Component {
             ))}
         </ul>
 
-        {emojis &&
+        {emojis && !emojis.length && (
-          !emojis.length && (
           <NotFound
             i18n={i18n}
             notFound={notFound}

src/polyfills/stringFromCodePoint.js

@@ -30,7 +30,7 @@ export default _String.fromCodePoint ||
         // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
         codePoint -= 0x10000
         highSurrogate = (codePoint >> 10) + 0xd800
-        lowSurrogate = codePoint % 0x400 + 0xdc00
+        lowSurrogate = (codePoint % 0x400) + 0xdc00
         codeUnits.push(highSurrogate, lowSurrogate)
       }
       if (index + 1 === length || codeUnits.length > MAX_SIZE) {

yarn.lock

@@ -6805,10 +6805,10 @@ preserve@^0.2.0:
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
   integrity sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=
 
-prettier@1.11.1:
+prettier@^1.16.4:
-  version "1.11.1"
+  version "1.16.4"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.11.1.tgz#61e43fc4cd44e68f2b0dfc2c38cd4bb0fccdcc75"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.16.4.tgz#73e37e73e018ad2db9c76742e2647e21790c9717"
-  integrity sha512-T/KD65Ot0PB97xTrG8afQ46x3oiVhnfGjGESSI9NWYcG92+OUPZKkwHqGWXH2t9jK1crnQjubECW0FuOth+hxw==
+  integrity sha512-ZzWuos7TI5CKUeQAtFd6Zhm2s6EpAD/ZLApIhsF9pRvRtM1RFo61dM/4MSRUA0SuLugA/zgrZD8m0BaY46Og7g==
 
 pretty-error@^2.0.2:
   version "2.1.1"