chore: move testing dependencies to workspace and bump dependencies

[chentsulin]

Due to the axios PR (axios/axios#2391) introduced in axios v1.19.1, we need to modify the config.url assertions to exclude baseURL.

[codecov]

Codecov Report

Merging #552 into master will not change coverage by %.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #552   +/-   ##
=======================================
  Coverage   90.59%   90.59%           
=======================================
  Files          25       25           
  Lines        1510     1510           
  Branches      427      427           
=======================================
  Hits         1368     1368           
  Misses         98       98           
  Partials       44       44           

Impacted Files	Coverage Δ
packages/messaging-api-line/src/LineNotify.ts	80.00% <ø> (ø)
packages/messaging-api-common/src/case.ts	97.56% <100.00%> (ø)

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