add zlib dep for windows builds

.gitmodules

@@ -10,3 +10,6 @@
 [submodule "freetype/libpng"]
 	path = deps/freetype/libpng
 	url = https://github.com/glennrp/libpng.git
+[submodule "deps/freetype/zlib"]
+	path = deps/freetype/zlib
+	url = https://github.com/madler/zlib.git

.travis.yml

@@ -25,8 +25,8 @@ before_script:
 
 script:
   - "if [[ \"$TRAVIS_RUST_VERSION\" == \"stable\" ]] ; then cargo fmt --all -- --check ; else true ; fi"
-  - cargo build --verbose --all
-  - cargo test --verbose --all
+  - cargo build --verbose
+  - cargo test --verbose -p term -p termwiz -p wezterm -p base91 -p varbincode
 
 addons:
   apt:

deps/fontconfig/build.rs

@@ -1,5 +1,4 @@
 use pkg_config;
-use std::env;
 
 fn main() {
     if let Ok(lib) = pkg_config::Config::new()

deps/freetype/build.rs

@@ -1,6 +1,13 @@
 use cmake::Config;
 use std::env;
 
+fn zlib() {
+    let mut config = Config::new("zlib");
+    let dst = config.profile("Release").build();
+    println!("cargo:rustc-link-search=native={}/lib", dst.display());
+    println!("cargo:rustc-link-lib=static=z");
+}
+
 fn libpng() {
     let mut config = Config::new("libpng");
     let dst = config.profile("Release").build();
@@ -18,13 +25,12 @@ fn freetype() {
     println!("cargo:rustc-link-search=native={}/lib", dst.display());
     println!("cargo:rustc-link-lib=static=freetype");
     println!("cargo:rustc-link-search=native=/usr/lib");
-    // println!("cargo:rustc-link-lib=bz2");
-    println!("cargo:rustc-link-lib=z");
     println!("cargo:include={}/include/freetype2", dst.display());
     println!("cargo:lib={}/lib/libfreetype.a", dst.display());
 }
 
 fn main() {
+    zlib();
     libpng();
     freetype();
     let out_dir = env::var("OUT_DIR").unwrap();

deps/freetype/zlib

@@ -0,0 +1 @@
+Subproject commit cacf7f1d4e3d44d871b605da3b647f07d718623f

deps/harfbuzz/build.rs

@@ -32,7 +32,6 @@ fn harfbuzz() {
     println!("cargo:rustc-link-search=native={}/lib", dst.display());
     println!("cargo:rustc-link-lib=static=harfbuzz");
     println!("cargo:rustc-link-search=native=/usr/lib");
-    println!("cargo:rustc-link-lib=z");
 }
 
 fn main() {

termwiz/src/color.rs

@@ -244,6 +244,6 @@ mod tests {
     fn roundtrip_rgbcolor() {
         let data = bincode::serialize(&RgbColor::from_named("DarkGreen").unwrap()).unwrap();
         eprintln!("serialized as {:?}", data);
-        let decoded: RgbColor = bincode::deserialize(&data).unwrap();
+        let _decoded: RgbColor = bincode::deserialize(&data).unwrap();
     }
 }