v6.0.0-alpha.2

• 9b87fee Chore: Fix formatter documentation generation (#11767) (Ilya Volodin)
• f116208 Chore: Fix site generation script for releases (#11766) (Ilya Volodin)
• cf9cce8 Update: Add never option for new-parens (refs #10034) (#11379) (pfgithub)
• b5fa149 New: multiple processors support (fixes #11035, fixes #11725) (#11552) (Toru Nagashima)
• 2d32a9e Breaking: stricter rule config validating (fixes #9505) (#11742) (薛定谔的猫)
• 71716eb Update: add fixer for no-div-regex rule (fixes #11355) (#11744) (joe-re)
• 53f7f4c Update: Uniform messages for the rules in "complexity" section (#11759) (Igor Novozhilov)
• 0a801d7 Chore: improve perf test (#11756) (薛定谔的猫)
• 45bd336 Docs: add about RuleTester's parser to migration guide (fixes #11728) (#11761) (Toru Nagashima)
• 1374be4 Docs: add table of contents in readme (#11765) (薛定谔的猫)
• 54e6eda New: extends in glob-based config (fixes #8813) (#11554) (Toru Nagashima)
• ec105b2 Chore: typo in JSDoc on timing.display's return value (#11755) (Dimitri Mitropoulos)
• e45cc3f Docs: updated no-proto rule (fixes #11743) (#11746) (Francesco Trotta)
• 15c6c63 Chore: eslint-config-eslint require node >= 8 (#11718) (薛定谔的猫)
• f9790ca Fix: typo: missing word in docs (#11750) (Dimitri Mitropoulos)
• 219aecb Chore: restructure files (#11555) (Toru Nagashima)
• 5dad0b1 Fix: Unignoring directories in .eslintignore (fixes #11684) (#11685) (Mykola Bilochub)
• 4625090 Docs: small fix about the migration guide (#11729) (Toru Nagashima)
• 0e89c73 Sponsors: Sync README with website (ESLint Jenkins)
• 5a296fa Sponsors: Sync README with website (ESLint Jenkins)
• 7c8e86b Fix: wrong 'plugin-missing' error on Node.js 12 (fixes #11720) (#11722) (Toru Nagashima)
• 67c671f Chore: ignore deprecated rules in fuzz tests (#11710) (Pig Fang)
• af81cb3 Chore: make fuzzer produce minimal reproducible examples of bugs (#11700) (Teddy Katz)