Ampel-core

This release contains minor bug fixes.

What's Changed
* Robustify T2DocView config resolution in T3 by jvansanten in https://github.com/AmpelProject/Ampel-core/pull/205
* JobCommand: reimplement urlretrieve with requests by jvansanten in https://github.com/AmpelProject/Ampel-core/pull/209


**Full Changelog**: https://github.com/AmpelProject/Ampel-core/compare/v0.8.4...v0.8.5

This is a bug fix release.

What's Changed
* JobCommand: regression fixes
- restore ability to skip tasks with `--task`
- restore exception handling in multiprocess mode
- restore variable interpolation via `expand_with`
* AbsWorker/T2Worker: bug fixes and performance enhancements for multi-worker processing
- do not consider tied dependency failed if it is marked NEW
- skip reporting transient errors if docs can be retried (waiting to insert a trouble doc can introduce significant delay)
- poll for new documents for a configurable time before exiting

**Full Changelog**: https://github.com/AmpelProject/Ampel-core/compare/v0.8.3...v0.8.4

v0.8.3 is the first stable release in the v0.8 series, and brings a nearly complete overhaul of Ampel internals by vbrinnel.

Major features
* cli commands to manipulate the Ampel backing database, e.g. export content, create views, view logs, reset t2s, etc.
* `ampel job` for running individual workflows ("job schemas") against a dedicated database
* T2: "tied" units that can use the output of other T2 units
* T3: unit outputs are accumulated in a `T3Store` and stored in the database. Instances of `AbsReviewT3Unit` receive both a collection of stock views and a `T3Store`, while instances of `T3PlainUnit` receive a `T3Store` only.

New Contributors
* mafn made their first contribution in https://github.com/AmpelProject/Ampel-core/pull/175
* simeonreusch made their first contribution in https://github.com/AmpelProject/Ampel-core/pull/181

Old contributors
* jvansanten

**Full Changelog**: https://github.com/AmpelProject/Ampel-core/compare/v0.7.6...v0.8.3