Merge pull request node-red#4095 from node-red/310-b2

Bump for beta.2

Merge branch 'master' into dev

Merge pull request node-red#3830 from node-red/release-302

Bump for 3.0.2

Merge pull request node-red#3797 from node-red/301

Update changelog and bump for 3.0.1

Merge pull request node-red#3764 from node-red/300

Node-RED 3.0 release

Update gen publish script for 3.x