resolve missing egrid facility fields for 2020 and 2021

[bl-young]

resolves #153

[dt-woods]

@bl-young, any idea when this patch might get released?

[bl-young]

@dt-woods remind me do you actually need a tagged version of the repo to incorporate this?

[dt-woods]

Not tagged, just incorporated. I guess this patch goes unmarked.

[bl-young]

I anticipate tagging it as 1.1.3, but may or may not try to resolve another error first unrelated to these egrid datasets.

[dt-woods]

FYI: I can confirm that pip install --upgrade --force-reinstall git+https://github.com/USEPA/standardizedinventories#egg=StEWI grabs the latest commit to master branch. Thanks.

[dt-woods]

P.S.: It's a good reminder that you have to clear the old eGRID_2020_v1.1.2.parquet file from your ~/Local/stewi/facility directory, else the new data aren't downloaded!