v0.18.2

Gridap v0.18.2

Diff since v0.18.1

Merged pull requests:

• Add zero AffineMap helper (#1003) (@pmartorell)
• use OrderedDict (#1004) (@mochen4)
• Changes required to have a proper definition for get_face_dofs() for Nedelec FEs (#1005) (@amartinhuertas)

Closed issues:

• non-deterministic matrix assembly for multiple domains (#1002)