Drop support for GHC < 8.6

.github/workflows/test.yaml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        ghc: ['8.0.2', '8.2.2', '8.4.4', '8.6.5', '8.8.4', '8.10.7', '9.0.2', '9.2.7', '9.4.5', '9.6.1']
+        ghc: ['8.6.5', '8.8.4', '8.10.7', '9.0.2', '9.2.7', '9.4.5', '9.6.1']
         cabal: ['3.8.1.0']
         include:
           - os: macOS-latest

filepath.cabal

@@ -16,14 +16,14 @@ category:           System
 build-type:         Simple
 synopsis:           Library for manipulating FilePaths in a cross platform way.
 tested-with:
-  GHC ==8.0.2
-   || ==8.2.2
-   || ==8.4.4
-   || ==8.6.5
+  GHC ==8.6.5
    || ==8.8.4
    || ==8.10.7
    || ==9.0.2
-   || ==9.2.3
+   || ==9.2.8
+   || ==9.4.8
+   || ==9.6.3
+   || ==9.8.1
 
 description:
   This package provides functionality for manipulating @FilePath@ values, and is shipped with <https://www.haskell.org/ghc/ GHC>. It provides two variants for filepaths:
@@ -91,7 +91,7 @@ library
 
   default-language: Haskell2010
   build-depends:
-    , base              >=4.9      && <4.20
+    , base              >=4.12.0.0      && <4.20
     , bytestring        >=0.11.3.0
     , deepseq
     , exceptions