CI doesn't check the crate using 1.34.0

[Lokathor]

The readme says that the crate should build with 1.34.0, but this isn't confirmed on a regular basis by the CI.

[Alphare]

I am trying to use flate2 (to implement some of the core tools within Mercurial), which has a dependency on miniz_oxide. Trying to build using 1.34.2 (the latest version available on Debian stable) yields the following error:

error[E0658]: use of unstable library feature 'alloc': this library is unlikely to be stabilized in its current form or name (see issue #27783)
  --> /home/alphare/.cargo/registry/src/github.com-1ecc6299db9ec823/miniz_oxide-0.4.0/src/lib.rs:28:1
   |
28 | extern crate alloc;
   | ^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.
error: Could not compile `miniz_oxide`.
warning: build failed, waiting for other jobs to finish...
error: build failed

Looking at the code, there does not seem to be a feature flag guarding the extern crate alloc statement, making this crate at least compatible with 1.36+, not 1.34, which is a bummer.

Looking into the issues and PRs it seems that #84 would fix the issue.