DearPyGui 0.7.x Support

[mwerezak]

• [ ] Revisit all issues tagged 0.7 and update TODO lists.
• [ ] Develop roadmap for 0.7, add new issues as needed.

[cz-czan]

@mwerezak Do you plan on maintaining this repository and upgrading it to 0.7 ?

[mwerezak]

I have been very busy lately so I cannot really provide much of a schedule for when that will happen, but yes.

[mwerezak]

I'm still in the process of getting a handle on all the things that have changed from 0.6 to 0.7