add msrv check

Author: danieleades

.github/workflows/ci.yml

@@ -76,3 +76,13 @@ jobs:
       run: sudo apt update && sudo apt-get install -y nodejs
     - name: Execute prettier
       run: npx prettier --debug-check -l './**/*.json' './**/*.graphql'
+
+  msrv:
+    runs-on: ubuntu-latest
+    env:
+      CARGO_NET_GIT_FETCH_WITH_CLI: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/install-action@cargo-no-dev-deps
+      - uses: dtolnay/rust-toolchain@1.62.1  # also set in Cargo.toml
+      - run: cargo no-dev-deps check -p graphql_client

graphql_client/Cargo.toml

@@ -10,6 +10,7 @@ categories = ["network-programming", "web-programming", "wasm"]
 edition = "2018"
 homepage = "https://github.com/graphql-rust/graphql-client"
 readme = "../README.md"
+rust-version = "1.62.1"  # also set in CI
 
 [package.metadata.docs.rs]
 features = ["reqwest"]