v0.3.0

LinearElasticityBase v0.3.0

Diff since v0.2.0

Merged pull requests:

• Add rotate, rotate_basis in transform.jl (#17) (@singularitti)
• Add types Variable & ElasticConstants, subtype all from them (#18) (@singularitti)
• Use isdcm in rotate & rotate_basis (#19) (@singularitti)
• Add tests for rotate_axes (#20) (@singularitti)
• Rename elastic_energy_density to energydensity (#21) (@singularitti)
• CompatHelper: add new compat entry for Einsum at version 0.4, (keep existing compat) (#22) (@github-actions[bot])