1.6.0

• refact(version): bump branch version to 1.6.0 (#68) (@prateekpandey14)
• refact(version): bump version to 1.7.0 (#67) (@prateekpandey14)
• feat(csi): get cstorvolume policy from the SC parameters (#66) (@prateekpandey14)
• feat(csi): add block volume support for cstor volume (#65) (@prateekpandey14)
• feat(csi-metrics): add metrics support for volumes (#64) (@prateekpandey14)
• fix(unmount): Fix unmount errors for xfs filesystem (#63) (@payes)