Update clang-format

- Rename travis dir
- Use same versions as in the i3 workflows

.github/workflows/main.yml

@@ -20,15 +20,15 @@ jobs:
     - run: git fetch --prune --unshallow
     - name: fetch or build Docker container
       run: |
-        docker build --pull --no-cache --rm -t=i3lock -f travis/Dockerfile .
+        docker build --pull --no-cache --rm -t=i3lock -f ci/Dockerfile .
         docker run -e CC -v $PWD:/usr/src:rw i3lock /bin/sh -c 'git config --global --add safe.directory /usr/src && mkdir build && cd build && CFLAGS="-Wformat -Wformat-security -Wextra -Wno-unused-parameter -Werror" meson .. && ninja'
   formatting:
     name: Check formatting
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - name: Install dependencies
       run: |
-        sudo apt-get install -y clang-format-11
+        sudo apt-get install -y clang-format-15
     - name: Check formatting
-      run: clang-format-11 --dry-run --Werror $(git ls-files '*.c' 'include/*.h')
+      run: clang-format-15 --dry-run --Werror $(git ls-files '*.c' 'include/*.h')

travis/Dockerfile → ci/Dockerfile

@@ -11,7 +11,7 @@ RUN echo 'APT::Acquire::Retries "5";' > /etc/apt/apt.conf.d/80retry
 # (3608 kB/s)). Hence, let’s stick with httpredir.debian.org (default) for now.
 
 # Install mk-build-deps (for installing the i3 build dependencies),
-# clang and clang-format-9 (for checking formatting and building with clang),
+# clang (for building),
 # lintian (for checking spelling errors),
 # test suite dependencies (for running tests)
 RUN apt-get update && \

meson/meson-dist-script

@@ -8,5 +8,5 @@ cd "${MESON_DIST_ROOT}"
 rm -rf \
    .clang-format \
    .editorconfig \
-   travis \
+   ci \
    .github