chore(ci): Build and upload binaries in CI (#76)

Use zigbuild directly instead of cargo-dist,
as cargo-dist doesn't suit our needs well
(e.g. uploading binaries at top level).

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

filtermail/Cargo.toml

@@ -28,7 +28,5 @@ parking_lot = "0.12.5"
 rstest = "0.26.1"
 testresult = "0.4.1"
 
-# The profile that 'dist' will build with
-[profile.dist]
-inherits = "release"
+[profile.release]
 lto = "thin"