Add support for new Sass module system, drop support for deprecated v…

…ersions of Sass (#144)

Co-authored-by: Kaelig Deloumeau-Prigent <kaelig@users.noreply.github.com>

.editorconfig

@@ -6,14 +6,11 @@ root = true
 
 [*]
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[*.json]
-indent_size = 2
-
 [*.md]
 trim_trailing_whitespace = false

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "semi": true,
+  "singleQuote": true,
+  "arrowParens": "always"
+}

.travis.yml

@@ -1,14 +1,9 @@
 language: node_js
 node_js:
-  - "8"
-  - "9"
-  - "10"
-  - "11"
-before_install:
-  - rvm install 2.2.2
-  - npm i npx
+  - '12'
+  - '13'
+  - '14'
 before_script:
-  - gem install sass
   - npm install
 script:
   - npm test

CHANGELOG.md

@@ -0,0 +1,38 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## Unreleased
+
+This is a major version bump that contains breaking changes. It adds support for the [new Sass module system](https://sass-lang.com/blog/the-module-system-is-launched) and dropping support for deprecated versions of Sass. No new features were added.
+
+### Added
+
+- Support for dart-sass@1.35.1
+- Test suite using [Jest](https://jestjs.io/) and [True](https://www.oddbird.net/true/), a unit-testing framework designed specifically for the Sass language
+
+### Removed
+
+- Dropped tests for Sass engines other than dart-sass
+- Dropped deprecated var `$mq-base-font-size` (https://github.com/sass-mq/sass-mq/pull/123)
+- Dropped compatibility with browsers that don’t support media queries:
+  - Removed `$mq-responsive`
+  - Removed `$mq-static-breakpoint`
+
+### Changed
+
+- Divisions are now performed with `sass:math.div(...)` instead of `/`
+- `get-breakpoint-width`: added `@return null` when no breakpoint could be found (a function must always return something, or Sass will throw an error).
+- Updated all `map-*` global functions in favor of the built-in module `map.*` (for example: `map-keys()` ➡️ `map.keys()`).
+- `px2em`: removed param `$base-font-size` (deprecated in v5.0.1), and use 16px instead.
+- Removed usage of `unit()` in favor of [`math.compatible()`](https://sass-lang.com/documentation/modules/math#compatible), as the `unit()` function is intended for debugging, and its output format is not guaranteed to be consistent across Sass versions or implementations.
+- Updated all other global Sass functions to use their module equivalents (for example: `map-merge` ➡️ `map.merge`, `append` ➡️ `list.append`)
+
+### Fixed
+
+## Changes prior to v6.0.0
+
+Changes prior to v6.0.0 were logged in https://github.com/sass-mq/sass-mq/releases