More strict rules

[martinpesout]

@adamkudrna after your talk in Prague, I tried to implement it in our project https://app.becontentking.com and also did some comparison with this article http://www.creativenightly.com/2016/02/How-to-lint-your-css-with-stylelint/

I think that rules can be more strict. I'll write you down my list of additional rules which works also for us:

• "max-empty-lines": 3 - sometimes I need to have more empty lines in my comments of SCSS. It will improve readability. But maximum 3 empty lines is enough
• "selector-list-comma-space-before": "never", "declaration-block-no-duplicate-properties": [true, {"ignore": ["consecutive-duplicates"]}] - prevent duplicates in SCSS
• "block-no-empty": true - disallow empty blocks in SCSS
• "color-no-invalid-hex": true - disallow invalid hex color
• "declaration-colon-space-before": "never" - require a single space or disallow whitespace before the colon of declarations
• "media-feature-colon-space-after": "always", "media-feature-colon-space-before": "never", "media-feature-name-no-vendor-prefix": true - add stylelint rules for media queries
• "number-leading-zero": "never" - disallow a leading zero for fractional numbers less than 1
• "number-no-trailing-zeros": true - disallow trailing zeros in numbers
• "property-no-vendor-prefix": true, "value-no-vendor-prefix": true - disallow vendor prefixes in SCSS. This job is done usually by autoprefixer.

[adamkudrna]

We decided to discontinue this project in favour of stylelint-config-visionapps which is a more strict fork of stylelint-config-standard.