Prepare release 8.2.0

Fixes #79
Fixes #131
Fixes 133

Author: sabberworm

CHANGELOG.md

@@ -20,6 +20,15 @@
 * *No backwards-incompatible changes*
 * *No deprecations*
 
+### 8.2.0 (2018-07-13)
+
+* Support parsing `calc()`, thanks to @raxbg.
+* Support parsing grid-lines, again thanks to @raxbg.
+* Support parsing legacy IE filters (`progid:`) in lenient mode, thanks to @FMCorz
+* Performance improvements parsing large files, again thanks to @FMCorz
+* *No backwards-incompatible changes*
+* *No deprecations*
+
 ## 7.0
 
 ### 7.0.0 (2015-08-24)

README.md

@@ -611,6 +611,7 @@ class Sabberworm\CSS\CSSList\Document#4 (2) {
 
 ## Contributors/Thanks to
 
+* [raxbg](https://github.com/raxbg) for contributions to parse `calc`, grid lines, and various bugfixes.
 * [FMCorz](https://github.com/FMCorz) for many patches and suggestions, for being able to parse comments and IE hacks (in lenient mode).
 * [Lullabot](https://github.com/Lullabot) for a patch that allows to know the line number for each parsed token.
 * [ju1ius](https://github.com/ju1ius) for the specificity parsing code and the ability to expand/compact shorthand properties.