Version 1.8.2

This bugfix release addresses a number of minor issues identified since the 1.8.1 release:

Feature:

• Added support for groupby to histogram operation. (#1725)

Fixes:

• Fixed problem with HTML export due to new extension logos. (#1778)
• Replaced deprecated call usage with opts method throughout codebase. (#1759, #1763, #1779)
• Fixed pip installation. (#1782)
• Fixed miscellaneous bugs (#1724, #1739, #1711)