Bump css_parser from 1.21.1 to 1.22.0

Bumps [css_parser](https://github.com/premailer/css_parser) from 1.21.1 to 1.22.0.
- [Changelog](https://github.com/premailer/css_parser/blob/master/CHANGELOG.md)
- [Commits](premailer/css_parser@v1.21.1...v1.22.0)

---
updated-dependencies:
- dependency-name: css_parser
  dependency-version: 1.22.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -22,7 +22,7 @@ GEM
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
       uri (>= 0.13.1)
-    addressable (2.8.8)
+    addressable (2.9.0)
       public_suffix (>= 2.0.2, < 8.0)
     base64 (0.3.0)
     bibtex-ruby (6.2.0)
@@ -58,7 +58,7 @@ GEM
       time (< 1.0)
     csl-styles (2.0.2)
       csl (~> 2.0)
-    css_parser (1.21.1)
+    css_parser (1.22.0)
       addressable
     cssminify2 (2.1.0)
     csv (3.3.5)
@@ -240,7 +240,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     prism (1.8.0)
-    public_suffix (7.0.2)
+    public_suffix (7.0.5)
     racc (1.8.1)
     rake (13.3.1)
     rb-fsevent (0.11.2)