Unified error handling

Cargo.lock

@@ -11,6 +11,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94a45b455c14666b85fc40a019e8ab9eb75e3a124e05494f5397122bc9eb06e0"
+
 [[package]]
 name = "approx"
 version = "0.5.1"
@@ -246,6 +252,7 @@ dependencies = [
 name = "hyperfine"
 version = "1.12.0"
 dependencies = [
+ "anyhow",
  "approx",
  "assert_cmd",
  "atty",