feat(core): raw response support

[jackyef]

#50

Feature

We now have a new DataOptions, raw?: boolean defaults to false.

With this PR:

1. We now only store the raw response string in DataClient.cache
2. Each hooks will call JSON.parse if DataOptions.raw === false (the default is false). There is also a simple caching mechanism to avoid calling JSON.parse repeatedly.
3. If DataOptions.raw === true, we simply return the stored raw response string

Bug Fix

Change the cache data structure to avoid collision with nested URL paths

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit e42e353:

Sandbox	Source
elegant-ritchie-6lz8r	Configuration

[codecov]

Codecov Report

Merging #51 into master will increase coverage by 0.13%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #51      +/-   ##
==========================================
+ Coverage   96.23%   96.37%   +0.13%     
==========================================
  Files          28       28              
  Lines         372      386      +14     
  Branches       90       96       +6     
==========================================
+ Hits          358      372      +14     
  Misses         14       14

Impacted Files	Coverage Δ
...act-isomorphic-data/src/common/utils/addToCache.ts	100% <100%> (ø)	⬆️
...es/react-isomorphic-data/src/common/preloadData.ts	100% <100%> (ø)	⬆️
...morphic-data/src/common/utils/retrieveFromCache.ts	100% <100%> (ø)	⬆️
...act-isomorphic-data/src/hooks/utils/useBaseData.ts	87.35% <100%> (+1.28%)	⬆️

---

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 f7cafc3...e42e353. Read the comment docs.