0.7.0

• 80b9d1d Add --container-save option
  ⚠️ requires enroot 3.1.0
• 63ae684 Passthrough new enroot variable MELLANOX_MOUNT_DRIVER
• bebcd48 Rely on the enroot config to determine if containers are read-write
  ⚠️ make sure your enroot configuration has ENROOT_ROOTFS_WRITABLE yes to get the previous behavior
• 6bd15a0 Handle kernels that don't support SECCOMP_FILTER_FLAG_SPEC_ALLOW