lowpass-filter 0.2.4

This is a `no_std` Rust library for simple digital low pass filters. You can use it for example to get the low frequencies from a song.
language: rust
  - stable
  - nightly
cache: cargo

  - cargo build --all-targets # test build works
  - cargo test --all-targets # tests must work
  - cargo check --target thumbv7em-none-eabihf # test no_std-build works
  - rustup target add thumbv7em-none-eabihf

  # examples
  - cargo run --release --example lpf-example
  - cargo run --release --example lpf-example-minimal