lightning-invoice 0.3.0

Data structures to parse and serialize BOLT11 lightning invoices
Documentation 
# lightning-invoice
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This repo provides data structures for BOLT 11 lightning invoices and
functions to parse and serialize these from and to bech32.

**Please be sure to run the test suite since we need to check assumptions
regarding `SystemTime`'s bounds on your platform. You can also call `check_platform`
on startup or in your test suite to do so.**

## Contributing
* same coding style standard as [rust-bitcoin/rust-lightning](https://github.com/rust-bitcoin/rust-lightning)
* use tabs and spaces (appropriately)
* no unnecessary dependencies