Use anyhow in build script

Cargo.lock

@@ -74,6 +74,12 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.75"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
+
 [[package]]
 name = "assert_cmd"
 version = "2.0.12"
@@ -106,6 +112,7 @@ name = "bat"
 version = "0.24.0"
 dependencies = [
  "ansi_colours",
+ "anyhow",
  "assert_cmd",
  "bincode",
  "bugreport",