feat(all): Fix AppVeyor tests

.appveyor.yml

@@ -1,24 +1,15 @@
 environment:
-  OPENSSL_INCLUDE_DIR: C:\OpenSSL\include
-  OPENSSL_LIB_DIR: C:\OpenSSL\lib
-  OPENSSL_LIBS: ssleay32:libeay32
   matrix:
+  - TARGET: x86_64-pc-windows-msvc
+  - TARGET: i686-pc-windows-msvc
+  - TARGET: x86_64-pc-windows-gnu
   - TARGET: i686-pc-windows-gnu
-    BITS: 32
-#  - TARGET: x86_64-pc-windows-msvc
-#    BITS: 64
-
 install:
-  - ps: Start-FileDownload "http://slproweb.com/download/Win${env:BITS}OpenSSL-1_0_2g.exe"
-  - Win%BITS%OpenSSL-1_0_2g.exe /SILENT /VERYSILENT /SP- /DIR="C:\OpenSSL"
-  - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-beta-${env:TARGET}.exe"
-  - rust-beta-%TARGET%.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
-  - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin
-  - SET PATH=%PATH%;C:\MinGW\bin
-  - rustc -V
-  - cargo -V
-
+  - curl -sSf -o rustup-init.exe https://win.rustup.rs/
+  - rustup-init.exe -y --default-host %TARGET%
+  - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin
+  - rustc -vV
+  - cargo -vV
 build: false
-
 test_script:
-  - cargo build --verbose
+  - cargo test