disable numpy restriction

Bump version 0.6.0 (arviz-devs#971)

Bump version to 0.5.1 (arviz-devs#820)

Bump ArviZ version to 0.5.0 (arviz-devs#818)

Bump ArviZ version to 0.4.1 (arviz-devs#699)

Increment version number to 0.4.0 (arviz-devs#674)

Bump minor version (arviz-devs#596)

Run tests without numba (arviz-devs#534)

* NUMBA_DISABLE_JIT=1 for .travis file

* import order

* test that placeholder func returns None

* rewrite custom jit

* better jit

* remove unneeded pylint disable

* Fix pylint

increase version to 0.3.1 (arviz-devs#458)

increase version to 0.3.0 (arviz-devs#449)