inject-mdc/thrift: Cross-build for Scala 2.13

[chrisbenincasa]

Problem

inject-mdc and thrift modules are not cross-built for Scala 2.13.

Solution

Update modules to cross-build for Scala 2.13 using new SBT settings.

Result

inject-mdc/thrift modules are cross-built for Scala 2.13.

[codecov[bot]]

Codecov Report

Merging #552 into develop will not change coverage. The diff coverage is 0.00%.

@@           Coverage Diff            @@
##           develop     #552   +/-   ##
========================================
  Coverage    90.92%   90.92%           
========================================
  Files          269      269           
  Lines         4872     4872           
  Branches       304      303    -1     
========================================
  Hits          4430     4430           
  Misses         442      442           

Impacted Files	Coverage Δ
.../twitter/finatra/thrift/routing/ThriftWarmup.scala	75.00% <0.00%> (ø)

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[cacoco]

Merged: 6fe7267ae852bc025d9c275ec0428730bcaa1d1c