Merge branch 'master' into dependabot/pip/opencv-contrib-python-4.5.1.48

Author: JensBlack

Readme.md

@@ -52,7 +52,7 @@ DeepLabStreams core feature is the utilization of real-time tracking to orchestr
 
  #### Contributing
 
-If you have feature requests or questions regarding the design of experiments join our [slack group](https://join.slack.com/t/dlstream/shared_invite/zt-jpy2olk1-CuJu0ZylGg_SLbO7zBkcrg) or go to [Gitter](https://gitter.im/DLStream/community) for a quick chat!
+If you have feature requests or questions regarding the design of experiments join our [slack group](https://join.slack.com/t/dlstream/shared_invite/zt-pdh6twf5-xHbpLvJtrTx32t12w8RDVQ) or go to [Gitter](https://gitter.im/DLStream/community) for a quick chat!
 
 We are constantly working to update and increase the capabilities of DLStream. 
 We welcome all feedback and input from your side.

requirements.txt

@@ -5,7 +5,7 @@ pigpio==1.78
 pyserial==3.5
 nidaqmx==0.5.7
 click==7.1.2
-opencv-python==3.4.5.20
+opencv-python==4.5.1.48
 opencv-contrib-python==4.5.1.48
 numpy>=1.14.5
 pandas==1.1.4