Throw error with invalid dojorc

[mwistrand]

Type: feature

The following has been addressed in the PR:

• [x] 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:

Throw an error with a clear message when the dojorc is not valid JSON.

Resolves #239

[codecov[bot]]

Codecov Report

Merging #240 into master will increase coverage by 0.03%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #240      +/-   ##
==========================================
+ Coverage   94.12%   94.16%   +0.03%     
==========================================
  Files          20       20              
  Lines         596      600       +4     
  Branches       95       95              
==========================================
+ Hits          561      565       +4     
  Misses         17       17              
  Partials       18       18

Impacted Files	Coverage Δ
src/configurationHelper.ts	96.66% <100%> (+0.51%)	:arrow_up:

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