0.6.2 Release Preparations

[btjanaka]

Description

Following the new instructions in #382, the actual 0.6.2 release will happen on the release/0.6.x branch.

TODO

• [x] Bump version
• [x] Update history

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go