update docs

remove Flask as a project requirement
add invoke commands

Author: Kilo59

README.md

@@ -391,7 +391,6 @@ These are the available API wrappers created by the community. They are not nece
 You will need the following things properly installed on your computer.
 
 * [Python 3](https://www.python.org/downloads/) (with pip)
-* [Flask](https://pypi.org/project/Flask/)
 * [pipenv](https://pypi.org/project/pipenv/)
 
 ## Installation
@@ -409,10 +408,17 @@ You will need the following things properly installed on your computer.
 ### Running Tests
 
 * `make test`
+* `invoke test`
 
 ### Linting
 
 * `make lint`
+* `invoke lint`
+
+### Formatting
+
+* `make fmt`
+* `invoke fmt`
 
 ### Building