Add a small note about requests-toolbelt
Merge pull request #1874 from kevinburke/typo

Typo in History
Add missing sled

Thanks @kevinburke
Update changelog for 2.2.1.
Update urllib3 to 9346c5c
Merge pull request #1876 from dstufft/update-urllib3

Update urllib3 to 9346c5c
v2.2.1
Merge pull request #1870 from sigmavirus24/add-toolbelt-to-docs

Add a small note about requests-toolbelt
NOTICE update
s/soley/solely