Require Node.js 8 and improve error messages and docs

Author: sindresorhus

.travis.yml

@@ -3,10 +3,9 @@ node_js:
   - '12'
   - '10'
   - '8'
-  - '6'
 matrix:
   include:
-    - node_js: 12
+    - node_js: '12'
       env: INTEGRATION=true
 script:
   - if [ $INTEGRATION == true ]; then npm run integration; else npm test; fi

docs/rules/catch-error-name.md

@@ -82,16 +82,26 @@ somePromise.catch(_ => {
 You can set the `name` option like this:
 
 ```js
-"unicorn/catch-error-name": ["error", {"name": "error"}]
+"unicorn/catch-error-name": [
+	"error",
+	{
+		"name": "error"
+	}
+]
 ```
 
 ### caughtErrorsIgnorePattern
 
 ```js
-"unicorn/catch-error-name": ["error", {"caughtErrorsIgnorePattern": "^_$"}]
+"unicorn/catch-error-name": [
+	"error",
+	{
+		"caughtErrorsIgnorePattern": "^_$"
+	}
+]
 ```
 
-This option lets you specify a regex pattern for matches to ignore. Default is `^_$`.
+This option lets you specify a regex pattern for matches to ignore. The default is `^_$`.
 
 With `^unicorn$`, this would fail:
 

docs/rules/custom-error-definition.md

@@ -2,6 +2,8 @@
 
 Enforces the only valid way of `Error` subclassing. It works with any super class that ends in `Error`.
 
+This rule is fixable.
+
 
 ## Fail
 

docs/rules/error-message.md

@@ -18,8 +18,8 @@ throw new TypeError();
 ```
 
 ```js
-const err = new Error();
-throw err;
+const error = new Error();
+throw error;
 ```
 
 
@@ -34,6 +34,6 @@ throw new TypeError('Foo');
 ```
 
 ```js
-const err = new Error('Foo');
-throw err;
+const error = new Error('Foo');
+throw error;
 ```

docs/rules/escape-case.md

@@ -2,6 +2,8 @@
 
 Enforces defining escape sequence values with uppercase characters rather than lowercase ones. This promotes readability by making the escaped value more distinguishable from the identifier.
 
+This rule is fixable.
+
 
 ## Fail
 

docs/rules/explicit-length-check.md

@@ -2,6 +2,8 @@
 
 Enforce explicitly checking the length of a value array in an `if` condition, rather than checking the truthiness of the length.
 
+This rule is partly fixable.
+
 ### Fail
 
 ```js
@@ -57,5 +59,3 @@ The `non-zero` option can be configured with one of the following:
 	- Enforces non-zero to be checked with: `array.length > 0`
 - `greater-than-or-equal`
 	- Enforces non-zero to be checked with: `array.length >= 1`
-
-It can be auto-fixed.

docs/rules/filename-case.md

@@ -1,6 +1,6 @@
 # Enforce a case style for filenames
 
-Enforces all linted files to have their names in a certain case style. Default is `kebabCase`.
+Enforces all linted files to have their names in a certain case style. The default is `kebabCase`.
 
 Files named `index.js` are ignored as they can't change case (Only a problem with `pascalCase`).
 
@@ -35,5 +35,10 @@ Files named `index.js` are ignored as they can't change case (Only a problem wit
 You can set the `case` option like this:
 
 ```js
-"unicorn/filename-case": ["error", {"case": "kebabCase"}]
+"unicorn/filename-case": [
+	"error",
+	{
+		"case": "kebabCase"
+	}
+]
 ```

docs/rules/import-index.md

@@ -2,6 +2,8 @@
 
 Enforces importing index file with `.` instead of `./`, `./index` or `./index.js`.
 
+This rule is fixable.
+
 
 ## Fail
 

docs/rules/new-for-builtins.md

@@ -2,7 +2,7 @@
 
 They work the same, but `new` should be preferred for consistency with other constructors.
 
-Enforces the use of `new` for following builtins.
+Enforces the use of `new` for following builtins:
 
 - `Object`
 - `Array`

docs/rules/no-array-instanceof.md

@@ -2,6 +2,8 @@
 
 The `instanceof Array` check doesn't work across realms/contexts, for example, frames/windows in browsers or the `vm` module in Node.js.
 
+This rule is fixable.
+
 
 ## Fail