Remove the hard pin on xlrd

so, with xlrd >=2, this library won't read xlsx and you will need pyexcel-xlsx. Otherwise, with xlrd <2, it still reads xlsx file.

Maintenance release

#41

Maintenance release

Restrict to python 3.6.

Breaking release

Support python 3.6+ only.

New style plugins

Update changelog

v0.5.9b

:books: update change log

Maintenance release

#35

0.5.8

see change log for more details

v0.5.7

Find 0.5.7 in changelog for more details

v0.5.6

Find 0.5.6 in changelog for more details

v0.5.5

Find 0.5.5 in changelog for more details