Fallback to context-less translation on Python 3.7

[krassowski]

Fallback to context-less translation on Python 3.7 and fix some typing issues.

Fixes jupyterlab/jupyterlab#11148, based on napari/napari#2305 (added @goanpeca as a co-author).

[codecov-commenter]

Codecov Report

Merging #213 (3bc9716) into master (3c905c1) will decrease coverage by 0.20%.
The diff coverage is 38.46%.

@@            Coverage Diff             @@
##           master     #213      +/-   ##
==========================================
- Coverage   77.16%   76.96%   -0.21%     
==========================================
  Files          28       28              
  Lines        2063     2071       +8     
==========================================
+ Hits         1592     1594       +2     
- Misses        471      477       +6     

Impacted Files	Coverage Δ
jupyterlab_server/translation_utils.py	74.03% <38.46%> (-1.57%)	⬇️

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[goanpeca]

Thanks for working on this @krassowski

LGTM!

[blink1073]

Thanks! Starting a release now

[krassowski]

Thanks for a quick release! I just confirmed that it works well with the latest release using a new gist with jupyterlab-server==2.8.2 pin (https://gist.github.com/krassowski/cef3614c3eae6d17f078fe15d88372c3).

[blink1073]

Great, thanks for verifying!