MSRV up to 1.55.0

Author: estin

.github/workflows/linux.yml

@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - 1.53.0 # MSRV
+          - 1.55.0 # MSRV
           - stable
           - nightly