remove the tslint prettier plugin

[agubler]

Type: feature

The following has been addressed in the PR:

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

Description:

With the commit hook for formatting typescript files with prettier, having the tslint plugin actually hinders development and basically masks actual linting issues (as people will just ignore the errors until prettier is run or the files are committed).

This change removes the plugin.

References dojo/meta#206

[codecov]

Codecov Report

Merging #157 into master will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #157      +/-   ##
==========================================
+ Coverage   84.88%   85.07%   +0.19%     
==========================================
  Files           1        1              
  Lines         516      516              
  Branches      138      138              
==========================================
+ Hits          438      439       +1     
  Misses         32       32              
+ Partials       46       45       -1

Impacted Files	Coverage Δ
src/loader.ts	85.07% <0%> (+0.19%)	⬆️

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