Bump node to 16 LTS

[abhidg]

node 12 is EOL as of 30 April 2022

[codecov-commenter]

Codecov Report

Merging #2741 (1e49a76) into main (8b23708) will increase coverage by 7.69%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2741      +/-   ##
==========================================
+ Coverage   56.69%   64.38%   +7.69%     
==========================================
  Files         110      166      +56     
  Lines        3457     6060    +2603     
  Branches     1097     1596     +499     
==========================================
+ Hits         1960     3902    +1942     
- Misses       1497     2158     +661     

Impacted Files	Coverage Δ
data-serving/data-service/src/model/vaccine.ts	100.00% <0.00%> (ø)
...fication/curator-service/api/src/model/database.ts	83.33% <0.00%> (ø)
...n/curator-service/api/src/model/failed_attempts.ts	53.84% <0.00%> (ø)
...ta-serving/data-service/src/model/case-revision.ts	100.00% <0.00%> (ø)
data-serving/data-service/src/model/date-range.ts	100.00% <0.00%> (ø)
...rator-service/api/src/clients/aws-lambda-client.ts	55.00% <0.00%> (ø)
...urator-service/api/src/clients/aws-batch-client.ts	95.83% <0.00%> (ø)
verification/curator-service/api/src/index.ts	83.68% <0.00%> (ø)
...cation/curator-service/api/src/controllers/auth.ts	44.41% <0.00%> (ø)
data-serving/data-service/src/model/source.ts	100.00% <0.00%> (ø)
... and 46 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.