Bump csslib to remove dynamic calls

Change-Id: Ic524bf0342884411e6b5c87da3a4a94df4e37f28
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/232300
Reviewed-by: Kevin Moore <kevmoo@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
diff --git a/DEPS b/DEPS
index 4892d40..7827868 100644
--- a/DEPS
+++ b/DEPS
@@ -93,7 +93,7 @@
   "collection_rev": "a4c941ab94044d118b2086a3f261c30377604127",
   "convert_rev": "e063fdca4bebffecbb5e6aa5525995120982d9ce",
   "crypto_rev": "b5024e4de2b1c474dd558bef593ddbf0bfade152",
-  "csslib_rev": "158bfa94eed08c12c07a8ee0a3fded0ebdcd1fcb",
+  "csslib_rev": "f746368a0a53cf8f68fd71b218239034e88841d5",
 
   # Note: Updates to dart_style have to be coordinated with the infrastructure
   # team so that the internal formatter `tools/sdks/dart-sdk/bin/dart format`