Flexible Dependency Management

[lazyoracle]

Is your feature request related to a problem? Please describe.
Currently our dependencies involve version pinning eg,

c3/setup.py

Lines 37 to 47 in 6e7e7a0

	install_requires=[
	"adaptive==0.11.1",
	"cma==3.0.3",
	"gast==0.3.3",
	"hjson==3.0.2",
	"rich==9.2.0",
	"numpy==1.19.5",
	"scipy==1.5.2",
	"tensorflow==2.4.1",
	"tensorflow-estimator==2.4.0",
	"tensorflow-probability==0.12.1",

The problem is that this will sooner or later lead to conflicts and issues when c3-toolset exists in environments with other packages that have even slightly differing requirements.

Describe the solution you'd like

1. We should probably move to a more flexible >= style requirements. OR
2. We release pre-built docker images to run everything in containers only