added zip support, pkg-fmt override

swapped CI to build zips for windows

src/helpers.rs

@@ -7,7 +7,7 @@ use cargo_toml::{Manifest};
 use flate2::read::GzDecoder;
 use tar::Archive;
 use xz2::read::XzDecoder;
-
+use zip::read::ZipArchive;
 
 use crate::{Meta};
 
@@ -77,6 +77,15 @@ pub fn extract<S: AsRef<Path>, P: AsRef<Path>>(source: S, fmt: PkgFmt, path: P)
 
             txz.unpack(path)?;
         },
+        PkgFmt::Zip => {
+            // Extract to install dir
+            debug!("Decompressing from archive '{:?}' to `{:?}`", source.as_ref(), path.as_ref());
+
+            let dat = std::fs::File::open(source)?;
+            let mut zip = ZipArchive::new(dat)?;
+
+            zip.extract(path)?;
+        },
         PkgFmt::Bin => {
             debug!("Copying data from archive '{:?}' to `{:?}`", source.as_ref(), path.as_ref());
             // Copy to install dir