Merge pull request #226 from messense/tester-0-8

Update `tester` dependency to 0.8.0

Author: Manishearth

Cargo.toml

@@ -25,7 +25,7 @@ serde = "1.0"
 serde_json = "1.0"
 serde_derive = "1.0"
 rustfix = "0.5"
-tester = "0.7"
+tester = "0.8"
 
 [target."cfg(unix)".dependencies]
 libc = "0.2"