ci: Add CI with Travis and AppVeyor (#2)

* ci: Add a Travis configuration

* ci: Add an appveyor config

* ci: Force up-to-date Cargo.lock in CI

* ci: Do not build or test verbosely

* ci: Improve build cache in AppVeyor

.travis.yml

@@ -0,0 +1,23 @@
+language: rust
+cache: cargo
+
+git:
+  depth: 1
+
+os:
+  - linux
+  - osx
+
+if: tag IS blank
+install: cargo build --all --locked
+script: cargo test --all
+
+notifications:
+  webhooks:
+    urls:
+      - https://zeus.ci/hooks/a3901574-fbb7-11e7-9451-0a580a280114/public/provider/travis/webhook
+    on_success: always
+    on_failure: always
+    on_start: always
+    on_cancel: always
+    on_error: always

appveyor.yml

@@ -0,0 +1,25 @@
+skip_tags: true
+
+cache:
+  - 'target'
+  - '%USERPROFILE%\.cargo'
+
+environment:
+  matrix:
+    - channel: stable
+      target: i686-pc-windows-msvc
+    - channel: stable
+      target: x86_64-pc-windows-msvc
+
+install:
+  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+  - rustup-init -yv --default-toolchain %channel% --default-host %target%
+  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
+  - rustc -vV
+  - cargo -vV
+
+build_script:
+  - cargo build --all --locked
+
+test_script:
+  - cargo test --all