Add Windows environment (#66)

* Add Windows environment

* Cargo update

Result of running:

cargo update -p cc --precise 1.0.41
cargo update -p schannel --precise 0.1.8

* Run sample-rate-max test only on Linux

Author: Luni-4

.github/workflows/lewton.yml

@@ -4,11 +4,12 @@ on: [push, pull_request]
 
 jobs:
   build:
-
-    runs-on: ubuntu-latest
     strategy:
       matrix:
         rust: [stable, 1.20.0]
+        platform: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+
     steps:
     - uses: actions/checkout@master
     - name: Install Rust

dev/cmp/Cargo.lock

@@ -70,6 +70,7 @@ fn test_libnogg_vals() {
 	cmp_output!("noise-6ch.ogg", 0);
 	cmp_output!("noise-stereo.ogg", 0);
 	cmp_output!("partial-granule-position.ogg", 2);
+	#[cfg(target_os = "linux")]
 	cmp_output!("sample-rate-max.ogg", 0);
 	ensure_malformed!("single-code-2bits.ogg", BadHeader(HeaderBadFormat));
 	// We can't cmp the output here because native