Add release section and musl targets in travis configuration

.travis.yml

@@ -1,13 +1,22 @@
 language: rust
 jobs:
   include:
-    # Stable channel.
     - os: linux
       rust: stable
       env: TARGET=x86_64-unknown-linux-gnu
+    - os: linux
+      rust: stable
+      env: TARGET=x86_64-unknown-linux-musl
     - os: linux
       rust: stable
       env: TARGET=i686-unknown-linux-gnu
+    - os: linux
+      rust: stable
+      env: TARGET=i686-unknown-linux-musl
+    - os: osx
+      osx_image: xcode11.4 # Catalina
+      rust: stable
+      env: TARGET=x86_64-apple-darwin
 
 env:
   global:
@@ -17,6 +26,16 @@ env:
     # Used on the deployment script
     - PROJECT_NAME=lowcharts
 
+deploy:
+  provider: releases
+  api_key:
+    secure: "ERwRPSWDU9cBE5DysvxPBlTz+BYVUjk+NpZZW1MWgd1MLj2HyW618QyJ025F57GaOed8kVvPXaSJ6wnsOhSnz5r3zI4kZueN5AwC6slAnmLqro6/5QBmCtKaK1Di72xJoF1iMh78jRVmIt+NuMo3crduZke+1JRcWnOe/qasDCfiRxfAJwRc4rj3Y0bfPLC1AVOasD4sUmaafwJAOjyuBJW7x7vu1fQTHs/QEThnoqdHJSTR8htd77ff7Iv+3+kFWYALOA2S8A8CGpEvHEAs6Yvt0ndaBqI/wfG6GUPZYErzJc2ZsVqjvWQexVw+J8pW54uOaDNfg6UTOMPTBdZC+Nz3VkIZehEHcNDjPCkp3am4DKubmhZz2XK8FvY5fNIRR+7dKb61USvzS9dv8INYrwjqFUOGqgS2TzzaqDELXsKyN+mMrr1VWc6RfnBnt1v9GH6KBwySYZbAwDaGapFOmYdj9/bg7wfD+7xk2cmq+8R4vukpEIHcQs8dNusYltQ/btYL0uTGToCQnjB3djSY30DUa+dvpgRzhL0Mw4CsXEjdOVCRP8sJpx/lUeRZv4ZKjYTKv96WBBxTlbNV55R9PPcr4d5uTqu+iSg0vDnDejyuRyPi9klj6bpiFumjLNqSNnJA7nQq7RWE9f8Xew7VEmNJd5MmJfS7KQiT8B0LGkw="
+  file:
+    - $PROJECT_NAME-$TRAVIS_TAG-$TARGET.*
+  skip_cleanup: true
+  on:
+    tags: true
+
 install:
   # prevent target re-add error from rustup
   - if [[ $TRAVIS_OS_NAME = linux && $HOST != $TARGET ]]; then rustup target add $TARGET; fi