merged

.travis.yml

 env:
   global:
     - NODE_VERSION=stable
+    - PATH=$PATH:$HOME/.yarn/bin
     - ANDROID_HOME=$HOME/android-sdk-linux
     - PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
 
   - v2
 
 cache:
+  yarn: true
   directories:
-    - $HOME/.yarn-cache
     - $HOME/.gradle/
     - $HOME/.m2
     - $ANDROID_HOME/licenses/
 
 before_install:
   - set -e
-  - ./scripts/clean.sh
+  - nvm install $NODE_VERSION
+  - curl -o- -L https://yarnpkg.com/install.sh | bash
 
 install:
-  - nvm install $NODE_VERSION
-  - npm i -g yarn
-  - yarn
+  - ./scripts/clean.sh
+  - yarn install
 
 script:
   - yarn run lint
   - yarn run test:js
   - ./scripts/installAndroidSDK.sh
   - yarn run test:android
+  - yarn run release
 
 after_script:
   - echo "BUILD FINISHED"
+
+notifications:
+  email: false
+  slack:
+    secure: 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

scripts/.npmrc

+email=${NPM_EMAIL}
+//registry.npmjs.org/:_authToken=${NPM_TOKEN}

scripts/release.js

+const cp = require('child_process');
+const p = require('path');
+const semver = require('semver');
+
+function execSync(cmd) {
+  cp.execSync(cmd, {stdio: ['inherit', 'inherit', 'inherit']});
+}
+
+function execSyncRead(cmd) {
+  return String(cp.execSync(cmd, {stdio: ['inherit', 'pipe', 'inherit']})).trim();
+}
+
+function execSyncSilently(cmd) {
+  cp.execSync(cmd, {stdio: ['ignore', 'ignore', 'ignore']});
+}
+
+function validateEnv() {
+  if (!process.env.CI || !process.env.TRAVIS) {
+    throw new Error(`releasing is only available from Travis CI`);
+  }
+
+  if (process.env.TRAVIS_BRANCH !== 'master') {
+    console.error(`not publishing on branch ${process.env.TRAVIS_BRANCH}`);
+    return false;
+  }
+
+  if (process.env.TRAVIS_PULL_REQUEST !== 'false') {
+    console.error(`not publishing as triggered by pull request ${process.env.TRAVIS_PULL_REQUEST}`);
+    return false;
+  }
+
+  return true;
+}
+
+function setupGit() {
+  execSyncSilently(`git config --global push.default simple`);
+  execSyncSilently(`git config --global user.email "${process.env.GIT_EMAIL}"`);
+  execSyncSilently(`git config --global user.name "${process.env.GIT_USER}"`);
+  const remoteUrl = new RegExp(`https?://(\\S+)`).exec(execSyncRead(`git remote -v`))[1];
+  execSyncSilently(`git remote add deploy "https://${process.env.GIT_USER}:${process.env.GIT_TOKEN}@${remoteUrl}"`);
+  execSync(`git checkout master`);
+}
+
+function calcNewVersion() {
+  const nextTaggedVersion = execSyncRead(`npm view ${process.env.npm_package_name}@next version`);
+  console.log(`next tagged version is: ${nextTaggedVersion}`);
+  return semver.inc(nextTaggedVersion, 'prerelease');
+}
+
+function copyNpmRc() {
+  const npmrcPath = p.resolve(`${__dirname}/.npmrc`);
+  execSync(`cp -rf ${npmrcPath} .`);
+}
+
+function tagAndPublish(newVersion) {
+  console.log(`new version is: ${newVersion}`);
+  execSync(`npm version ${newVersion} -m "v${newVersion} [ci skip]"`);
+  execSyncSilently(`git push deploy --tags`);
+  execSync(`npm publish --tag next`);
+}
+
+function run() {
+  if (!validateEnv()) {
+    return;
+  }
+  setupGit();
+  copyNpmRc();
+  tagAndPublish(calcNewVersion());
+}
+
+run();

yarn.lock

     babel-runtime "^6.0.0"
 
 babel-plugin-istanbul@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-istanbul/-/babel-plugin-istanbul-3.0.0.tgz#da7324520ae0b8a44b6a078e72e883374a9fab76"
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/babel-plugin-istanbul/-/babel-plugin-istanbul-3.1.2.tgz#11d5abde18425ec24b5d648c7e0b5d25cd354a22"
   dependencies:
     find-up "^1.1.2"
-    istanbul-lib-instrument "^1.1.4"
+    istanbul-lib-instrument "^1.4.2"
     object-assign "^4.1.0"
-    test-exclude "^3.2.2"
+    test-exclude "^3.3.0"
 
 babel-plugin-jest-hoist@^18.0.0:
   version "18.0.0"
   dependencies:
     append-transform "^0.3.0"
 
-istanbul-lib-instrument@^1.1.1, istanbul-lib-instrument@^1.1.4, istanbul-lib-instrument@^1.3.0:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.3.1.tgz#112c25a4f2f9bc361d13d14bbff992331b974e52"
+istanbul-lib-instrument@^1.1.1, istanbul-lib-instrument@^1.3.0, istanbul-lib-instrument@^1.4.2:
+  version "1.4.2"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-1.4.2.tgz#0e2fdfac93c1dabf2e31578637dc78a19089f43e"
   dependencies:
     babel-generator "^6.18.0"
     babel-template "^6.16.0"
   version "18.0.0"
   resolved "https://registry.yarnpkg.com/jest-mock/-/jest-mock-18.0.0.tgz#5c248846ea33fa558b526f5312ab4a6765e489b3"
 
+jest-react-native@18.x.x:
+  version "18.0.0"
+  resolved "https://registry.yarnpkg.com/jest-react-native/-/jest-react-native-18.0.0.tgz#77dd909f069324599f227c58c61c2e62168726ba"
+
 jest-resolve-dependencies@^18.1.0:
   version "18.1.0"
   resolved "https://registry.yarnpkg.com/jest-resolve-dependencies/-/jest-resolve-dependencies-18.1.0.tgz#8134fb5caf59c9ed842fe0152ab01c52711f1bbb"
     pinkie-promise "^2.0.0"
     strip-bom "^2.0.0"
 
+lodash-es@^4.2.0:
+  version "4.17.4"
+  resolved "https://registry.yarnpkg.com/lodash-es/-/lodash-es-4.17.4.tgz#dcc1d7552e150a0640073ba9cb31d70f032950e7"
+
 lodash._arraycopy@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/lodash._arraycopy/-/lodash._arraycopy-3.0.0.tgz#76e7b7c1f1fb92547374878a562ed06a3e50f6e1"
   dependencies:
     commander "~2.8.1"
 
-"semver@2 || 3 || 4 || 5", semver@5.x, semver@^5.0.3, semver@^5.1.0, semver@^5.3.0, semver@~5.3.0:
+"semver@2 || 3 || 4 || 5", semver@5.x, semver@5.x.x, semver@^5.0.3, semver@^5.1.0, semver@^5.3.0, semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
 
     os-tmpdir "^1.0.0"
     rimraf "~2.2.6"
 
-test-exclude@^3.2.2:
+test-exclude@^3.3.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-3.3.0.tgz#7a17ca1239988c98367b0621456dbb7d4bc38977"
   dependencies:
   resolved "https://registry.yarnpkg.com/whatwg-fetch/-/whatwg-fetch-1.1.1.tgz#ac3c9d39f320c6dce5339969d054ef43dd333319"
 
 whatwg-url@^4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-4.1.1.tgz#567074923352de781e3500d64a86aa92a971b4a4"
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-4.2.0.tgz#abf1a3f5ff4bc2005b3f0c2119382631789d8e44"
   dependencies:
     tr46 "~0.0.3"
     webidl-conversions "^3.0.0"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-2.0.0.tgz#306c543835f09ee1a4cb23b7bce9ab341c91cdd4"
 
 yargs-parser@^4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-4.2.0.tgz#6ced869cd05a3dca6a1eaee38b68aeed4b0b4101"
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-4.2.1.tgz#29cceac0dc4f03c6c87b4a9f217dd18c9f74871c"
   dependencies:
     camelcase "^3.0.0"