Fix Travis tests

It kept on using 0.1.1, which didn't actually compile.

Cargo.toml

@@ -8,8 +8,8 @@ name = "exa"
 
 [dependencies]
 ansi_term = "0.4.5"
-datetime = "0.1.1"
-datetime_macros = "0.1.1"
+datetime = "0.1.2"
+datetime_macros = "0.1.2"
 getopts = "0.2.1"
 natord = "1.0.7"
 number_prefix = "0.2.3"