build(deps-dev): bump sass from 1.28.0 to 1.29.0 (vuejs#2559)

Author: dependabot-preview[bot]

yarn.lock

@@ -6516,9 +6516,9 @@ sane@^4.0.3:
     walker "~1.0.5"
 
 sass@^1.26.9:
-  version "1.28.0"
-  resolved "https://registry.yarnpkg.com/sass/-/sass-1.28.0.tgz#546f1308ff74cc4ec2ad735fd35dc18bc3f51f72"
-  integrity sha512-9FWX/0wuE1KxwfiP02chZhHaPzu6adpx9+wGch7WMOuHy5npOo0UapRI3FNSHva2CczaYJu2yNUBN8cCSqHz/A==
+  version "1.29.0"
+  resolved "https://registry.yarnpkg.com/sass/-/sass-1.29.0.tgz#ec4e1842c146d8ea9258c28c141b8c2b7c6ab7f1"
+  integrity sha512-ZpwAUFgnvAUCdkjwPREny+17BpUj8nh5Yr6zKPGtLNTLrmtoRYIjm7njP24COhjJldjwW1dcv52Lpf4tNZVVRA==
   dependencies:
     chokidar ">=2.0.0 <4.0.0"