no_std is broken

[MarkSwanson]

Edit: actually, just try to compile the rust-compression crate will fail using:
cargo build --target thumbv7m-none-eabi

Add compression to a no_std crate and compile for an arm micro controller like:
cargo build --target thumbv7m-none-eabi

error[E0463]: can't find crate for std
--> /home/mswanson/.cargo/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.4.0/src/inline_lazy.rs:9:1
|
9 | extern crate std;
| ^^^^^^^^^^^^^^^^^ can't find crate

Cargo.toml:
[dependencies.compression]
version = "0.1.4"
default-features = false
features = ["deflate"]

[Pear0]

It needs a note maybe, but this is fairly easy to fix. If you read the file name that actually causes the error, it's lazy_static.
if you add lazy_static to your project, you can set the features to support no_std lazy_static = { version = "1.4.0", features = ["spin_no_std"] }

[Qix-]

Could the feature perhaps be re-exported? cargo doesn't really have a great way of pinning sub-dependencies in order to do this cleanly.

[EvansJahja]

Just raised PR #36

Honestly most of the stuffs don't require lazy_static anyway. If you're using gzip / bzip2, then for now @Pear0 's solution is needed