Fix entire codebase

[raklaptudirm]

Welcome to JavaScript community

 know more

Describe your change:

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new JavaScript files are placed inside an existing directory.
• All filenames should use the UpperCamelCase (PascalCase) style. There should be no spaces in filenames.
  Example:UserProfile.js is allowed but userprofile.js,Userprofile.js,user-Profile.js,userProfile.js are not
• All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[raklaptudirm]

This pull-request is big and fixes many problems in the codebase. The changes have been briefed below for the ease of review. I will merge the branch on approval.

Jobs

• Ran standard --fix on the entire codebase.
• Fix unsolved standardjs warnings.
• Fix Broken tests.

Feats

• Dynamic-Programming/ZeroOneKnapsack.js: Fixed bad code. Better use of Array.prototype.map()
• Maths/Polynomial.js: Fixed bad code. Better use of Array.prototype.filter()
• Sorts/InsertionSort.js: Changed var to let
• Sorts/IntroSort.js: Changed var to const
• String/PermutateString.js: Array.prototype.map() -> Array.prototype.forEach()
• String/LevenshteinDistance.test.js: Fixed broken doctest
• Linear-Algebra/test/test.js: FIxed BADLY broken test.

Style Updates

• Conversions/DecimalToBinary.js
• Conversions/HexToRGB.js
• Conversions/RomanToDecimal.js
• Data-Structures/Linked-List/SinglyLinkList.js
• Data-Structures/Stack/Stack.js
• Data-Structures/Tree/BinarySearchTree.js
• Data-Structures/Tree/Trie.js
• Linear-Algebra/src/la_lib.js
• Maths/Fibonacci.js
• Search/LinearSearch.js
• Sorts/GnomeSort.js
• Sorts/HeapSort.js
• Sorts/InsertionSort.js
• Sorts/IntroSort.js
• Sorts/MergeSort.js
• Sorts/QuickSort.js
• Sorts/RadixSort.js
• Sorts/SelectionSort.test.js
• Sorts/ShellSort.js
• Sorts/TopologicalSort.js
• Sorts/WiggleSort.js
• Trees/DepthFirstSearch.js

Tests

This PR, as mentioned, also fixes all the tests. Here are the previous and current test runs:

Previous Run (commit 37ef611):

Test Suites: 2 failed, 46 passed, 48 total
Tests:       1 failed, 177 passed, 178 total
Snapshots:   0 total
Time:        38.376 s
Ran all test suites.

Current Run (commit 2bf0ccf):

Test Suites: 48 passed, 48 total
Tests:       198 passed, 198 total
Snapshots:   0 total
Time:        29.226 s
Ran all test suites.

Fixed Issues

• Tests failing: Files need to be fixed or removed #539