build: merge back to dev after publish TTK for VS 17.12 P3

[Siglud]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.54%. Comparing base (5fd1392) to head (ef0e026).
Report is 51 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #12477      +/-   ##
==========================================
- Coverage   94.72%   94.54%   -0.19%     
==========================================
  Files         583      583              
  Lines       35248    34929     -319     
  Branches     7009     6872     -137     
==========================================
- Hits        33390    33023     -367     
- Misses       1582     1593      +11     
- Partials      276      313      +37     

Files with missing lines	Coverage Δ
packages/fx-core/src/common/featureFlags.ts	100.00% <100.00%> (ø)
packages/fx-core/src/common/wrappedAxiosClient.ts	96.85% <100.00%> (+0.01%)	⬆️
...ackages/fx-core/src/component/coordinator/index.ts	93.29% <100.00%> (-2.46%)	⬇️
.../fx-core/src/component/generator/apiSpec/helper.ts	96.80% <100.00%> (-0.85%)	⬇️
...e/src/component/generator/officeAddin/generator.ts	99.13% <100.00%> (-0.87%)	⬇️
...omponent/generator/templates/templateReplaceMap.ts	100.00% <100.00%> (ø)
packages/fx-core/src/question/constants.ts	97.54% <100.00%> (-0.54%)	⬇️
packages/fx-core/src/question/create.ts	96.11% <100.00%> (-1.26%)	⬇️
packages/spec-parser/src/adaptiveCardGenerator.ts	98.66% <100.00%> (ø)
packages/spec-parser/src/constants.ts	100.00% <ø> (ø)
... and 16 more

... and 1 file with indirect coverage changes