Bump premailer from 1.12.1 to 1.13.1 (#14544)

Bumps [premailer](https://github.com/premailer/premailer) from 1.12.1 to 1.13.1.
- [Release notes](https://github.com/premailer/premailer/releases)
- [Changelog](https://github.com/premailer/premailer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/premailer/premailer/compare/v1.12.1...v1.13.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -401,7 +401,7 @@ GEM
       activerecord (>= 5)
     pkg-config (1.4.1)
     posix-spawn (0.3.15)
-    premailer (1.12.1)
+    premailer (1.13.1)
       addressable
       css_parser (>= 1.6.0)
       htmlentities (>= 4.0.0)