add RELEASE.md (#90)

Author: kimxogus

RELEASE.md

@@ -0,0 +1,16 @@
+## react-native-version-check Release documentation
+
+1. Check if CI test succeeded.
+
+   - [CircleCI](https://circleci.com/gh/kimxogus/react-native-version-check/tree/master)
+
+2. Make sure `react-native-version-check-expo` depends on latest `react-native-version-check`
+
+   - ex) When releasing `1.0.0`, `[email protected]` should depend on `rnvc@^1.0.0`
+   - https://github.com/kimxogus/react-native-version-check/blob/master/packages/react-native-version-check-expo/package.json#L29
+
+3. Run `lerna version VERSION`
+
+   - Release commit and tag will be automatically pushed to remote
+
+4. Run `lerna publish from-git` to release to npm