message: Update version of clang-format used
diff: @@ -19,7 +19,7 @@ RUN apt-get update \
  zlib1g-dev
  # Setup the LLVM repository
  -RUN echo deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main > /etc/apt/sources.list.d/clang.list
  +RUN echo deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main > /etc/apt/sources.list.d/clang.list
  # Download the GBG key to use the LLVM repo
  ADD https://apt.llvm.org/llvm-snapshot.gpg.key /tmp/llvm.key
  @@ -27,16 +27,16 @@ ADD https://apt.llvm.org/llvm-snapshot.gpg.key /tmp/llvm.key
  RUN apt-key add /tmp/llvm.key
  RUN apt-get update \
  - && apt-get install -y clang-9 clang-format-9 \
  + && apt-get install -y clang-11 clang-format-11 \
  && rm -rf /var/lib/apt/lists/*
  # Make clang the default compiler
  ENV CC clang
  ENV CXX clang++
  -RUN ln -s /usr/bin/clang-9 /usr/bin/clang \
  - && ln -s /usr/bin/clang++-9 /usr/bin/clang++ \
  - && ln -s /usr/bin/clang-format-9 /usr/bin/clang-format \
  - && ln -s /usr/bin/git-clang-format-9 /usr/bin/git-clang-format
  +RUN ln -s /usr/bin/clang-11 /usr/bin/clang \
  + && ln -s /usr/bin/clang++-11 /usr/bin/clang++ \
  + && ln -s /usr/bin/clang-format-11 /usr/bin/clang-format \
  + && ln -s /usr/bin/git-clang-format-11 /usr/bin/git-clang-format
  RUN cd /opt \
  && wget -nv https://cmake.org/files/v3.15/cmake-3.15.2-Linux-x86_64.tar.gz \
  