6.0.0 Release

• New rules were added, which could potentially break builds.
• Requires node 10 or higher.
• Requires eslint 7.22.0 or higher.

• Adds automatic configuration of your babel config for @babel/eslint-parser.
• Adds new environments.
  • commonjs
  • shared-node-browser
• Adds reporting of unused eslint-disable comments.
• Adds better browser global support.
• Adds rules.
  • eslint/default-case-last
  • eslint/default-param-last
  • eslint/grouped-accessor-pairs
  • eslint/no-dupe-else-if
  • eslint/no-invalid-this
  • eslint/no-loss-of-precision
  • eslint/no-nonoctal-decimal-escape
  • eslint/no-promise-executor-return
  • eslint/no-restricted-imports
    • Disallows moment.
  • eslint/no-setter-return
  • eslint/no-unreachable-loop
  • eslint/no-unsafe-optional-chaining
  • eslint/no-useless-backreference
  • eslint/prefer-exponentiation-operator
  • eslint/prefer-named-capture-group
  • eslint/prefer-regex-literals
  • import/group-exports
  • jest/expect-expect
  • jest/no-conditional-expect
  • jest/no-deprecated-functions
  • jest/no-done-callback
  • jest/no-interpolation-in-snapshots
  • jest/no-restricted-matchers
  • jest/prefer-hooks-on-top
  • jest/valid-title
  • jsx-a11y/autocomplete-valid
  • node/callback-return
  • node/handle-callback-err
  • node/no-callback-literal
  • node/no-exports-assign
  • node/no-new-require
  • node/no-path-concat
  • node/no-process-exit
  • node/no-sync
  • node/prefer-promises/dns
  • node/prefer-promises/fs
  • react-native/no-single-element-style-arrays
  • react/function-component-definition
  • react/jsx-curly-brace-presence
  • react/jsx-no-constructed-context-values
  • react/jsx-no-script-url
  • react/jsx-sort-default-props
  • react/no-adjacent-inline-elements
  • unicorn/better-regex
  • unicorn/consistent-destructuring
  • unicorn/consistent-function-scoping
  • unicorn/empty-brace-spaces
  • unicorn/filename-case
  • unicorn/no-array-push-push
  • unicorn/no-instanceof-array
  • unicorn/no-lonely-if
  • unicorn/no-nested-ternary
  • unicorn/no-new-array
  • unicorn/no-null
  • unicorn/no-object-as-default-parameter
  • unicorn/no-process-exit
  • unicorn/no-this-assignment
  • unicorn/prefer-array-find
  • unicorn/prefer-array-flat-map
  • unicorn/prefer-array-some
  • unicorn/prefer-date-now
  • unicorn/prefer-default-parameters
  • unicorn/prefer-dom-node-append
  • unicorn/prefer-dom-node-dataset
  • unicorn/prefer-dom-node-remove
  • unicorn/prefer-dom-node-text-content
  • unicorn/prefer-keyboard-event-key
  • unicorn/prefer-math-trunc
  • unicorn/prefer-negative-index
  • unicorn/prefer-number-properties
  • unicorn/prefer-optional-catch-binding
  • unicorn/prefer-regexp-test
  • unicorn/prefer-set-has
  • unicorn/prefer-spread
  • unicorn/prefer-string-replace-all
  • unicorn/prefer-string-slice
  • unicorn/prefer-string-starts-ends-with
  • unicorn/prefer-string-trim-start-end
  • unicorn/prefer-ternary
  • unicorn/string-content
    • Checks for http and recommends https.

• Changes babel-eslint to @babel/eslint-parser.
• Changes ecmaVersion from 2020 to 2021.
• Changes rule options.
  • eslint/accessor-pairs
    • Adds getWithoutSet option.
  • eslint/camelcase
    • Adds ignoreImports option.
  • eslint/no-implicit-globals
    • Adds lexicalBindings option.
  • eslint/no-unsafe-negation
    • Adds enforceForOrderingRelations option.
  • eslint/no-useless-computed-key
    • Adds enforceForClassMembers option.
  • import/no-unresolved
    • Adds amd and commonjs options.
  • react/jsx-key
    • Adds checkKeyMustBeforeSpread option.
  • react/jsx-no-target-blank
    • Adds warnOnSpreadAttributes option.

• Fixes sporadic eslint couldn't find the plugin errors (see eslint/eslint#3458 for more information).

• Removes plugins.
  • eslint-plugin-babel
    • It was replaced with @babel/eslint-plugin, but the rules it's meant to override are not configurable in the same way. For example, the @babel/new-cap rule does not have a capIsNewExceptions option like the base eslint rule.
• Removes rules.
  • eslint/callback-return
    • Replaced by node/callback-return.
  • eslint/handle-callback-err
    • Replaced by node/handle-callback-err.
  • eslint/multiline-comment-style
    • We're over it. 🙄
  • eslint/no-nested-ternary
    • Replaced by unicorn/prefer-ternary.
  • eslint/no-new-require
    • Replaced by node/no-new-require.
  • eslint/no-path-concat
    • Replaced by node/no-path-concat.
  • eslint/no-process-exit
    • Replaced by unicorn/no-process-exit.
  • jest/no-empty-title
    • Replaced by jest/valid-title.
  • jest/no-expect-resolves
    • Replaced by jest/no-restricted-matchers.
  • jest/no-test-callback
    • Renamed to jest/no-done-callback.
  • jest/no-truthy-falsy
    • Replaced by jest/no-restricted-matchers.
  • jest/no-try-expect
    • Replaced by jest/no-conditional-expect.
  • react/jsx-no-literals
    • Replaced by react/jsx-curly-brace-presence.
  • unicorn/no-array-instanceof
    • Renamed to unicorn/no-instanceof-array.
  • unicorn/prefer-event-key
    • Renamed to unicorn/prefer-keyboard-event-key.
  • unicorn/prefer-flat-map
    • Renamed to unicorn/prefer-array-flat-map.
  • unicorn/prefer-node-append
    • Renamed to unicorn/prefer-dom-node-append.
  • unicorn/prefer-node-remove
    • Renamed to unicorn/prefer-dom-node-remove.
  • unicorn/prefer-starts-ends-with
    • Renamed to unicorn/prefer-string-starts-ends-with.
  • unicorn/prefer-text-content
    • Renamed to unicorn/prefer-dom-node-text-content.
  • unicorn/regex-shorthand
    • Renamed to unicorn/better-regex.