Pass features map down to BTR

[KaneFreeman]

Type: bug

The following has been addressed in the PR:

• There is a related issue
• All code has been formatted with prettier
• Unit or Functional tests are included in the PR
• schema.json has been updated appopriately

Description:
Pass features map down to BTR

Dependent on dojo/webpack-contrib#329

Resolves dojo/webpack-contrib#306

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 43.50%. Comparing base (7b72a3f) to head (ae55ea3).
Report is 12 commits behind head on master.

Files with missing lines	Patch %	Lines
src/base.config.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #466   +/-   ##
=======================================
  Coverage   43.50%   43.50%           
=======================================
  Files          12       12           
  Lines         878      878           
  Branches      265      265           
=======================================
  Hits          382      382           
  Misses        496      496           

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