Update requirements.txt and environment.yaml

[magic-lantern]

Related to issue #4, update requirements.txt (for pip) and environment.yaml (for conda) to use more current versions of libraries where possible.

In Google colab, many of the libraries used in KFP are newer than what is allowed by our requirements/environment files, which leads to inconsistencies when installing. Since Google Colab cannot handle virtualenvs/conda envs, there isn't a way to isolate requirements as one would expect in a full Python environment.