semantic-release shareable config to publish npm packages with simple commit rules

This is a shareable config to publish npm packages with simple commit rules bases on angular preset of commit-analyzer plugin with following change: docs, chore and refactor commit types yield patch version. Thus pretty much any correctly formatted commit message yields new version.

$ yarn add --dev "simple-semantic-config"

The shareable config can be configured in the semantic-release configuration file or package.json:

{
  "release": {
    "extends": "simple-semantic-config"
  }
}

Figures out new version according to semantic-release configuration, and writes it to build/.version file.

Example: BRANCH=master yarn simple-semantic-release-pre

OR

ALLOW_FAILING=false BRANCH=development yarn simple-semantic-release-pre

OR

OUT_DIR=tmp BRANCH=master yarn simple-semantic-release-pre

This requires having write Git access to repo specified in package.json, you can set it by exporting GH_TOKEN env var with: export GH_TOKEN=my-key

When it's run in CircleCI build context it uses CIRCLE_BRANCH so specifying BRANCH is not needed there: yarn simple-semantic-release-pre is enough.

semantic-release takes previous versions info from Github tags of origin remote, so when running it from local fork switch origin to upstream to get the correct new version:

git remote rm origin
git remote add origin git@github.com:upstream/my-project.git
BRANCH=master yarn simple-semantic-release-pre 
git remote rm origin
git remote add origin git@github.com:my-account/my-project.git