WIP: Null object in array

[jonaskello]

Graphql may return null for an object in an array. This is not handled today.

[Jontem]

What happended before when an object was null in an array?

[jonaskello]

There was an exception before. I think the first place it manifested was when it tried to do getObjectId(null).

[codecov]

Codecov Report

Merging #25 into master will increase coverage by 0.17%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
+ Coverage   91.59%   91.76%   +0.17%     
==========================================
  Files           4        4              
  Lines         238      243       +5     
  Branches       75       77       +2     
==========================================
+ Hits          218      223       +5     
  Misses         20       20

Impacted Files	Coverage Δ
src/entity-cache.ts	69.69% <ø> (ø)	⬆️
src/denormalize.ts	98.57% <100%> (+0.04%)	⬆️
src/normalize.ts	98.27% <100%> (+0.09%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 382b6bd...4aa145d. Read the comment docs.