message: Upgrade squashfs tools version to 4.5.1
  Upgrade the squashfs tools version used in the northstar docker images
  to 4.5.1 because of CVE-2021-41072.
diff: git clone https://github.com/plougher/squashfs-tools.git
  cd squashfs-tools/squashfs-tools
  -git checkout 4.5
  +git checkout 4.5.1
  make install
  cd ../../
  rm -r squashfs-tools
  \ No newline at end of file
  