Major stable release 2021/05/28

Not many changes since 0.3.0. However, as this release contains a commit that improved the security, users are strongly encouraged to upgrade their existing RTMPLite3.

pip install rtmplite3==0.3.5 # this version
# or
python -m pip install rtmplite3==0.3.5

Change log:

1. Improved the security by re-writing some functions that were created by using exec() originally.