Install Cargo-hack using install-action

Cargo hack uses a newer Rust version than our MSRV, so manually
installing it is becoming a pain.

Author: Thomasdezeeuw

.github/workflows/main.yml

@@ -40,8 +40,7 @@ jobs:
     - name: Install Rust (rustup)
       run: rustup update ${{ matrix.rust }} --no-self-update && rustup default ${{ matrix.rust }}
       shell: bash
-    - name: Install cargo-hack
-      run: cargo install cargo-hack
+    - uses: taiki-e/install-action@cargo-hack
     - name: Run tests
       run: cargo hack test --feature-powerset && cargo hack test --feature-powerset --release
 
@@ -68,8 +67,7 @@ jobs:
     - uses: actions/checkout@master
     - name: Install Rust
       run: rustup update stable && rustup default stable
-    - name: Install cargo-hack
-      run: cargo install cargo-hack
+    - uses: taiki-e/install-action@cargo-hack
     - name: Install Target
       run: rustup target add ${{ matrix.target }}
     - name: Run check
@@ -87,8 +85,7 @@ jobs:
     - uses: actions/checkout@master
     - name: Install Rust nightly
       run: rustup update nightly && rustup default nightly
-    - name: Install cargo-hack
-      run: cargo install cargo-hack
+    - uses: taiki-e/install-action@cargo-hack
     - name: Install Target
       run: rustup target add ${{ matrix.target }}
     - name: Run check