v0.2.0:
* Add feature-gated "let-assert" macro for nightly.
* Implement semi-standard CLICOLOR / CLICOLOR_FORCE standard correctly.
v0.1.2:
* Add `debug_assert!(...)` for parity with the standard library.
v0.1.1:
* Synchronize README with library documentation.
v0.1.0:
* Fully compatible with Rust stable.
* Only use `proc_macro_span` on nightly.
* Tweak colors in output.
v0.0.9:
* Use `proc-macro-hack` to avoid `feature(proc_macro_hygiene)`.
* Use auto-deref specialization to avoid `feature(proc_macro_hygiene)`.
v0.0.8:
* Fix compilation error in assert!()
* Limit scope of generated temporary variables
v0.0.7:
* Update documentation.
v0.0.6:
* Support additional arguments to print custom messages with failures.
v0.0.5:
* Update documentation.
* Fix images in documentation.
v0.0.4:
* Support pattern matching with `let` expressions in assertions.