update packages to their latest versions

Author: sunshowers

Cargo.toml

@@ -14,7 +14,7 @@ keywords = ["datatest", "data-driven-tests", "test-harness"]
 [dependencies]
 regex = "1.5.4"
 walkdir = "2.3.2"
-structopt = "0.3.25"
+structopt = "0.3.26"
 termcolor = "1.1.2"
 
 [[test]]