Runs rustdoc as part of the CI

Allows to find some bugs in the documentation

.github/workflows/tests.yml

@@ -173,6 +173,30 @@ jobs:
         env:
           RUST_BACKTRACE: 1
 
+  rustdoc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+      - run: rustup update
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo doc --all-features
+        working-directory: ./lib
+
+  rustdoc_msrv:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+      - run: rustup update && rustup override set 1.60.0
+      - uses: Swatinem/rust-cache@v2
+      - run: cargo doc --all-features
+        working-directory: ./lib
+        env:
+          RUSTDOCFLAGS: -D warnings
+
   js:
     runs-on: ubuntu-latest
     steps: