Check in lockfile

https://twitter.com/jonhoo/status/1571290371124260865

Note that this "increases" the MSRV to 1.63 since we have a dependency
on libc, but at the time of writing, Rust 1.42 still works just fine if
you are willing to use older versions of the dependencies.

Author: jonhoo

.github/workflows/check.yml

@@ -112,7 +112,7 @@ jobs:
     # https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability
     strategy:
       matrix:
-        msrv: ["1.42.0"]
+        msrv: ["1.63.0"] # libc
     name: ubuntu / ${{ matrix.msrv }}
     steps:
       - uses: actions/checkout@v4

.gitignore

@@ -1,2 +1 @@
 target
-Cargo.lock