[Snyk] Security upgrade eslint from 2.13.1 to 6.6.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	768/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 7.5	Regular Expression Denial of Service (ReDoS) SNYK-JS-ANSIREGEX-1583908	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: eslint

The new version differs by 250 commits.

• 879c373 6.6.0
• c8ba30a Build: changelog update for 6.6.0
• 39dfe08 Update: false positives in function-call-argument-newline (fixes Use HTML5 to Require a Field grammar fix freeCodeCamp/freeCodeCamp#12123) (Rewrite same code freeCodeCamp/freeCodeCamp#12280)
• 4d84210 Update: improve report location for no-trailing-spaces (fixes feat(nav): Show dropdown hover freeCodeCamp/freeCodeCamp#12315) (many results it is here, but all is not are good for nothing.... freeCodeCamp/freeCodeCamp#12477)
• c6a7745 Update: no-trailing-spaces false negatives after comments (fixes Add a quick markdown challenge for new members freeCodeCamp/freeCodeCamp#12479) (Radio Buttons code not working despite using the correct format freeCodeCamp/freeCodeCamp#12480)
• 0bffe95 Fix: no-misleading-character-class crash on invalid regex (fixes Delete button is not align properly  freeCodeCamp/freeCodeCamp#12169) (Add target blank to anchor link to open in new tab freeCodeCamp/freeCodeCamp#12347)
• c6a9a3b Update: Add enforceForIndexOf option to use-isnan (fixes Won't let me continue because of no p tag cling tag freeCodeCamp/freeCodeCamp#12207) (MongoDB Runnning Problem using the instruction freeCodeCamp/freeCodeCamp#12379)
• 364877b Update: measure plugin loading time and output in debug message (Challenge Target the same element with multiple jQuery Selectors has an issue. freeCodeCamp/freeCodeCamp#12395)
• 1744fab Fix: operator-assignment removes and duplicates comments (Sort arrays with Sort issue freeCodeCamp/freeCodeCamp#12485)
• 52ca11a Fix: operator-assignment invalid autofix with adjacent tokens (chore: remove transition-replace freeCodeCamp/freeCodeCamp#12483)
• 0f6d0dc Fix: CLIEngine#addPlugin reset lastConfigArrays (fixes Advanced Algorithm Challenge - Friendly Date Ranges: Update for 2017 freeCodeCamp/freeCodeCamp#12425) (Update react-redux to version 5.0.2 🚀 freeCodeCamp/freeCodeCamp#12468)
• 923a8cb Chore: Fix lint failure in JSDoc comment (Cannot progress to next challenge due to missing "proceed to next challenge" link freeCodeCamp/freeCodeCamp#12489)
• aac3be4 Update: Add ignored prop regex no-param-reassign (Nesting an img to an a element freeCodeCamp/freeCodeCamp#11275)
• e5382d6 Chore: Remove unused parameter in dot-location (Grammatical Error in Challenge freeCodeCamp/freeCodeCamp#12464)
• 49faefb Fix: no-obj-calls false positive (fixes fix(webpack): Always use browser debug freeCodeCamp/freeCodeCamp#12437) (Bootstrap challenge passed with wrong answer freeCodeCamp/freeCodeCamp#12467)
• b3dbd96 Fix: problematic installation issue (fixes changed last test from 'JUMPED' to 'JUMPS' freeCodeCamp/freeCodeCamp#11018) (Refactor for react-redux-form freeCodeCamp/freeCodeCamp#12309)
• cd7c29b Sponsors: Sync README with website
• 8233873 Docs: Add note about Node.js requiring SSL support (fixes Fixed type issue #11404 freeCodeCamp/freeCodeCamp#11413) (help me freeCodeCamp/freeCodeCamp#12475)
• 89e8aaf Fix: improve report location for no-tabs ([Target HTML Elements with Selectors Using jQuery] freeCodeCamp/freeCodeCamp#12471)
• 7dffe48 Update: Enable function string option in comma-dangle (fixes #target5 button is cloned and appended two times after "Run tests" in result (mobile phone view) freeCodeCamp/freeCodeCamp#12058) (Now 2017. Tests should be changed  freeCodeCamp/freeCodeCamp#12462)
• e15e1f9 Docs: fix doc for no-unneeded-ternary rule (fixes improved sentence structure freeCodeCamp/freeCodeCamp#12098) (Need more test for Escape Sequences in Strings. freeCodeCamp/freeCodeCamp#12410)
• b1dc58f Sponsors: Sync README with website
• 61749c9 Chore: Provide debug log for parser errors (all test Cases are trues  freeCodeCamp/freeCodeCamp#12474)
• 7c8bbe0 Update: enforceForOrderingRelations no-unsafe-negation (fixes This Error freeCodeCamp/freeCodeCamp#12163) (justin beiber freeCodeCamp/freeCodeCamp#12414)

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