feat: add validation success console message

[bolatovumar]

Adds validation success message.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Related Issue

Close #76

Motivation and Context

Informs the user that everything is good so the user is not left wondering if the validation actually ran successfully.

How Has This Been Tested?

Manually

Screenshots (if appropriate):

Checklist:

• [ ] I have updated the documentation (if required).
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [ ] I added a picture of a cute animal cause it's fun

[codecov-io]

Codecov Report

Merging #87 into master will increase coverage by 2.69%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #87      +/-   ##
==========================================
+ Coverage   96.87%   99.56%   +2.69%     
==========================================
  Files          11       11              
  Lines         192      230      +38     
  Branches       31       40       +9     
==========================================
+ Hits          186      229      +43     
+ Misses          5        1       -4     
+ Partials        1        0       -1     

Impacted Files	Coverage Δ
packages/lockfile-lint/src/main.js	95.65% <0.00%> (ø)
packages/lockfile-lint-api/index.js	100.00% <0.00%> (ø)
packages/lockfile-lint/src/validators/index.js	100.00% <0.00%> (ø)
...s/lockfile-lint-api/src/validators/ValidateHost.js	100.00% <0.00%> (ø)
...kages/lockfile-lint-api/src/common/PackageError.js
...es/lockfile-lint-api/src/validators/ValidateUrl.js	100.00% <0.00%> (ø)

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[lirantal]

Good stuff, thanks @bolatovumar

[XhmikosR]

FYI the emojis don't work on Windows default cmd @lirantal

[lirantal]

Thanks @XhmikosR. what does it look like?

[XhmikosR]

[lirantal]

Gotcha. Feel like PRing a small one to remove the emoji?