Remove support for GHC 8

Author: rowanG077

.github/workflows/ci.yml

@@ -58,16 +58,10 @@ jobs:
         cabal:
           - "3.10"
         ghc:
-          - "8.10.7"
           - "9.0.2"
           - "9.2.8"
           - "9.4.8"
           - "9.6.4"
-        exclude:
-          # Clash 1.6 doesn't support latest GHCs
-          - {clash: "1.8.1", ghc: "9.2.8"}
-          - {clash: "1.8.1", ghc: "9.4.8"}
-          - {clash: "1.8.1", ghc: "9.6.4"}
 
     env:
       clash_version: ${{ matrix.clash }}

clash-protocols.cabal

@@ -91,8 +91,8 @@ common common-options
 
   default-language: Haskell2010
   build-depends:
-    -- GHC >= 8.10
-    base >= 4.14.0.0,
+    -- GHC >= 9.0
+    base >= 4.15.0.0,
     Cabal,
 
     clash-prelude >= 1.8.1 && < 1.10,