chore(release): 1.5.0

Fix platformURL for BDC/CN

Closes #474

Tests done

From a clean install (no ~/.sevenbridges/rabix-composer directory)

1. Add local folder
2. Open local CWL
3. Add local cwl executor
4. Run test several times
5. Add BDC platform account
6. Push to platform
7. Open on platform
8. Run pushed app on local executor
9. Verify that sbg:draft2 automatically invokes
   bundled Rabix Executor

1.5-rc1 -> master prepare for release

chore: OSX Notarization

update package.json version

Merge branch 'release/v1.0.1-rc.1' of https://github.com/rabix/composer…

… into release/v1.0.1-rc.1-latest

upgrade cwlts for outputBinding fix

changing form yarn to npm

add appveyor badge

chore(npm): cwlts version