Fixing Bucket RxJS Observables!

This release fixes the Bucket#changeStream Observable, thus also fixing Bucket#valueStream.

• Add pretest script 2dc2e9f
• Merge pull request #6 from bumble-org/fix-change-stream 1dbb674
• Fix change stream bug f8d4c3a
• Upgrade package deps 5681275
• Fix ts plugin settings d0a4e4d
• Fix tasks df292ad

v1.0.2...v1.1.0