Update and rename .travis.yml to .appveyor.yml

Author: slightlyoutofphase

.appveyor.yml

@@ -0,0 +1,66 @@
+image:
+  - Visual Studio 2022
+  - Ubuntu2004
+  - macOS
+environment:
+  APPVEYOR_YML_DISABLE_PS_LINUX: true
+  matrix:
+    - TARGET: x86_64-pc-windows-msvc
+    - TARGET: i686-pc-windows-msvc
+    - TARGET: x86_64-unknown-linux-gnu
+    - TARGET: x86_64-apple-darwin
+matrix:
+  exclude:
+    - image: Ubuntu2004
+      TARGET: x86_64-pc-windows-msvc
+    - image: Ubuntu2004
+      TARGET: i686-pc-windows-msvc
+    - image: Ubuntu2004
+      TARGET: x86_64-apple-darwin
+    - image: macOS
+      TARGET: x86_64-pc-windows-msvc
+    - image: macOS
+      TARGET: i686-pc-windows-msvc
+    - image: macOS
+      TARGET: x86_64-unknown-linux-gnu
+    - image: Visual Studio 2022
+      TARGET: x86_64-unknown-linux-gnu
+    - image: Visual Studio 2022
+      TARGET: x86_64-apple-darwin
+skip_tags: true
+branches:
+  only:
+    - master
+for:
+  -
+    matrix:
+      only:
+        - image: Visual Studio 2022
+    install:
+      - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
+      - cmd: rustup-init.exe -yv --default-toolchain nightly --default-host %TARGET% --profile minimal
+      - cmd: set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+    cache:
+      #- '%USERPROFILE%\.cargo'
+  -
+    matrix:
+      only:
+        - image: Ubuntu2004
+    install:
+      - curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -yv --default-toolchain nightly --default-host x86_64-unknown-linux-gnu --profile minimal
+    cache:
+      #- '/home/appveyor/.cargo'
+  -
+    matrix:
+      only:
+        - image: macOS
+    install:
+      - curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -yv --default-toolchain nightly --default-host x86_64-apple-darwin --profile minimal
+    cache:
+      #- '$HOME/.cargo'
+build: false
+test_script:
+  # We run the suite once with all functionality enabled, and then once without
+  # the default features to make sure `no_std` support has not been broken
+  - cmd: ./ci/run_windows.bat
+  - sh: sudo sh ./ci/run_linux_and_mac.sh