diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 0de315af..8cc0bcc4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,6 +18,10 @@ jobs:
     - uses: actions/checkout@v3
     - name: Install cmake
       run: sudo apt-get install cmake
+    - name: Checkout submodules
+      run: |
+        git submodule init
+        git submodule update
     - name: Build
       run: cargo build --all-features --verbose
     - name: Run tests
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
new file mode 100644
index 00000000..df8d3de1
--- /dev/null
+++ b/.github/workflows/docs.yml
@@ -0,0 +1,46 @@
+name: Publish Documentation
+
+on:
+  push:
+    branches: [ "master" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  docs:
+    needs: build
+
+    runs-on: ubuntu-latest
+
+    # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+    permissions:
+      contents: read
+      pages: write      # to deploy to Pages
+      id-token: write   # to verify the deployment originates from an appropriate source
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup Pages
+      id: pages
+      uses: actions/configure-pages@v4
+    - name: Build Docs
+      run: cargo doc --no-deps --all-features --verbose
+    - name: Upload artifact
+      uses: actions/upload-pages-artifact@v3
+      with:
+        path: './target/doc'
+    - name: Deploy to GitHub Pages
+      id: deployment
+      uses: actions/deploy-pages@v4
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 8f4f9842..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-language: rust
-cache: cargo
-rust:
-  - stable
-  - beta
-  - nightly
-
-env:
-  global:
-  - secure: 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
-  - secure: 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
-
-addons:
-  apt:
-    packages:
-    - cmake
-
-script:
-- cargo build --all-features --verbose
-- cargo test --all-features --verbose
-
-after_success:
-- |
-  [ $TRAVIS_BRANCH = master ] &&
-  [ $TRAVIS_PULL_REQUEST = false ] &&
-  cargo doc --all-features --no-deps &&
-  pip install --user ghp-import &&
-  ghp-import -n target/doc &&
-  git push -fq https://${GH_TOKEN}@github.com/${TRAVIS_REPO_SLUG}.git gh-pages
-- |
-  [ $TRAVIS_BRANCH = master ] &&
-  [ $TRAVIS_PULL_REQUEST = false ] &&
-  cargo publish --token ${CRATESIO_TOKEN}
diff --git a/src/user_data.rs b/src/user_data.rs
index b4cc6a5a..5dc3daca 100644
--- a/src/user_data.rs
+++ b/src/user_data.rs
@@ -33,7 +33,7 @@ pub trait RawUserData: Sized {
 #[doc(hidden)]
 pub trait RawUserDataMut: RawUserData {
     unsafe fn internal_user_data_mut<T: ?Sized, U>(self) -> *mut InternalUserData<T, U>;
-    unsafe fn set_internal_user_data<T: ?Sized, U>(self, *mut InternalUserData<T, U>);
+    unsafe fn set_internal_user_data<T: ?Sized, U>(self, _: *mut InternalUserData<T, U>);
 }
 
 macro_rules! impl_raw_user_data {