Update to TypeScript 2.4

[kitsonk]

Type: feature

The following has been addressed in the PR:

• There is a related issue
• All code matches the style guide
• Unit or Functional tests are included in the PR

Description:

This PR updates to TypeScript 2.4, migrates to --strict and does a bit of tsconfig.conf cleanup.

Refs: dojo/meta#189

[codecov]

Codecov Report

Merging #151 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #151   +/-   ##
=======================================
  Coverage   98.94%   98.94%           
=======================================
  Files          15       15           
  Lines         379      379           
  Branches       46       46           
=======================================
  Hits          375      375           
  Partials        4        4

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