TS2.7 forwards compatibility

[agubler]

Type: feature

The following has been addressed in the PR:

• [ ] There is a related issue
• [x] All code has been formatted with prettier as per the readme code style guidelines
• [x] Unit or Functional tests are included in the PR

Description:

Forwards compatibility for TS2.7 and upgrade @dojo/core.

Requires release of dojo/i18n and dojo/widget-core

[codecov[bot]]

Codecov Report

Merging #29 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #29   +/-   ##
=======================================
  Coverage   83.05%   83.05%           
=======================================
  Files           2        2           
  Lines          59       59           
  Branches       15       15           
=======================================
  Hits           49       49           
  Misses          7        7           
  Partials        3        3

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