fix(lambda-at-edge): remove blacklisted CloudFront headers before ret…

[dphang]

…urning api/default/image handler response

Should fix: #898

[codecov]

Codecov Report

Merging #923 (11278dd) into master (7d393ed) will increase coverage by 0.07%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##           master     #923      +/-   ##
==========================================
+ Coverage   81.33%   81.41%   +0.07%     
==========================================
  Files          68       69       +1     
  Lines        2502     2518      +16     
  Branches      596      601       +5     
==========================================
+ Hits         2035     2050      +15     
- Misses        400      401       +1     
  Partials       67       67              

Impacted Files	Coverage Δ
...da-at-edge/src/headers/removeBlacklistedHeaders.ts	90.00% <90.00%> (ø)
packages/libs/lambda-at-edge/src/api-handler.ts	85.93% <100.00%> (+0.45%)	⬆️
...ackages/libs/lambda-at-edge/src/default-handler.ts	93.42% <100.00%> (+0.04%)	⬆️
packages/libs/lambda-at-edge/src/image-handler.ts	97.22% <100.00%> (+0.16%)	⬆️

---

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 7d393ed...4d0b903. Read the comment docs.