I fixed the build problem! version 0.5.0

Cargo.lock

 [root]
 name = "exa"
-version = "0.4.0"
+version = "0.5.0"
 dependencies = [
  "ansi_term 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "datetime 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

 [package]
 name = "exa"
-version = "0.4.0"
+version = "0.5.0"
 authors = [ "ogham@bsago.me" ]
 
 [[bin]]

README.md

@@ -2,9 +2,6 @@
 
 [exa](https://the.exa.website/) is a replacement for `ls` written in Rust.
 
-Works on all recent Rust versions >= 1.4.0.
-
-
 ## Screenshots
 
 ![Screenshots of exa](screenshots.png)