Upgrade to Pip 21.1 in preparation to upgrade DBT 19.
The latest Pip has
- a stricter resolver
- access to more up to date Python wheels (e.g. #2267 is solved since as any version after Pip 21 has access to ready-compiled Python wheels, see https://issues.apache.org/jira/browse/ARROW-11835).
- in theory faster pip installs (https://github.com/pypa/pip/issues/9187#issuecomment-826037738 makes me think the current Pip version is stable enough be consumed)
Also relax the constraint for `requests` and `backoff` since both were actually specifying incompatible versions that the old Pip resolver was silently swallowing.
Test this locally first by running git clean -dfx to remove all the existing venv files. The two different Pip versions do not work well.
Template generation for new Source using the Santa CDK - provide basic scaffolding for someone implementing a new source.
General approach is to buff up comments in the original SDK, and add TODOs with secondary comments in the generated stub methods, as well as links to existing examples (e.g. Stripe or ExchangeRate api) users can look at.
Checked in and added tests for the generated modules.
* add symlinks for intellij includes
* add python support for exchangerate
* add python support for other modules
* get working across all projects
* add pydantic deps
* revert testing code
* mypy
* use python 3.7 in github actions
* remove unused envs plugin
* increase line length
* increase line length to 140 (run formatting)
* don't ignore most init.py
* does this happen to work on github actions?
* try to fix generation
* try to have GA chown
* exclude re-generation
