Merge pull request #102 from Pauan/master

Fixing Rust CI to use the latest version

Author: Pauan

.ci/install-rust.yml

@@ -2,6 +2,8 @@ steps:
   - script: |
       set -e
       curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain $RUSTUP_TOOLCHAIN
+      rustup update $RUSTUP_TOOLCHAIN
+      rustup override set $RUSTUP_TOOLCHAIN
       echo "##vso[task.setvariable variable=PATH;]$PATH:$HOME/.cargo/bin"
     env:
       RUSTUP_TOOLCHAIN: ${{parameters.rust_version}}
@@ -11,4 +13,4 @@ steps:
   - script: |
         rustc -Vv
         cargo -V
-    displayName: Query rust and cargo versions
+    displayName: Query rust and cargo versions