A normal version number MUST take the form `X.Y.Z`

where `X, Y,`

and `Z`

are non-negative integers, and MUST NOT contain leading zeroes. `X`

is the major version, `Y`

is the minor version, and `Z`

is the patch version. Each element MUST increase numerically. For instance: `1.9.0 -> 1.10.0 -> 1.11.0`

.