Create a more robust pyproject.toml file

[ascidian-ai]

ENVIRONMENT SETUP
Windows 10 (64-bit), Anaconda 2.0.4, Python 3.8.10, Jupyter Notebook 6.4.3

PROBLEM
I've had numpy compatability issues getting tensornets 0.4.6 installed.

I eventually managed to get tensornets 0.4.5 installed and running with the following dependancies

• cython==0.29.24
• numpy==1.19.5
• tensorflow==2.6.0

ISSUE
wheel had issues identifying the right dependancies when I tried to rebuild 0.4.6 from source.

When I took a closer look at the current version I noticed the pyproject.toml file is missing versions for cython and numpy and does not include any dependancies for tensorflow libraries or python.

RESOLUTION
I believe a more robust pyproject.toml is needed which might go someway to helping developers identify installation issues.
At a minimum I think the following items should be defined in the pyproject.toml file along with version dependancies:

• Python
• various tensorflow packages
• numpy (version dependancy to be added)
• cython (version dependancy to be added)