[Diff since v0.1.7](v0.1.7...v0.2.0)

- Update to post1.0 Julia

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Making evaluation without dimension specified much faster

Removing coveralls

This is temporary due to wierd error. https://travis-ci.org/s-baumann/MultivariateFunctions.jl/jobs/485189207
When that is solved I will turn on coveralls again.

Some updates.

Update Project.toml

Fixing REQUIRE file

Update REQUIRE

Bug fixes from empty units_ in PE_Functions