Create new JS Foundations exercises (3 of 3)

[wvmitchell]

Activity to be updated: JS Foundations

Summary of changes needed:

• 3 new test suites
• Each test suite should be centered around a certain topic
• Each suite should demand the creation of 4-5 functions, with enough tests that hardcoding results becomes tiresome
• README should be updated accordingly

Competencies to be practiced

• Passing multiple arguments
• Passing arrays and objects as arguments
• Using conditional logic based on parameters
• Correct use of return
• Creating 'pure' functions, that always result in the same output
• Use of array properties and methods
• Use of dot/bracket notation

Note

The repository for this issue is listed as front-end-curriculum, even though the repository is really turingschool-examples/javascript-foundations. This is due to the fact that the project board cannot belong to more than one org (turingschool vs turingschool-examples)