Install rust/cargo for CI builds

.travis.yml

@@ -39,6 +39,11 @@ before_cache:
   - rm -rf $HOME/.cache/electron-builder
 before_install:
   - rm -rf node_modules
+  # Install Rust and Cargo
+  - curl https://sh.rustup.rs -sSf > /tmp/rustup.sh
+  - sh /tmp/rustup.sh -y
+  - export PATH="$HOME/.cargo/bin:$PATH"
+  - source "$HOME/.cargo/env"
 
 branches:
   except:

appveyor.yml

@@ -11,7 +11,15 @@ init:
   - git config --global core.autocrlf input
 
 install:
+  # Install node
   - ps: Install-Product node 10 x64
+  # Install Rust and Cargo
+  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  - rustup-init -yv --default-toolchain stable --default-host x86_64-pc-windows-msvc
+  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+  - rustc -vV
+  - cargo -vV
+  # Install dependencies
   - yarn
 
 build_script: