Fix werkzeug 2.1.0 import and skip calculation

[deepyaman]

Closes #83

[T4rk1n]

In dash we used the werkzeug debugger html in the dev tools ui. As it not used in here, we can remove that import and just use traceback module to get stacktrace.

[deepyaman]

In dash we used the werkzeug debugger html in the dev tools ui. As it not used in here, we can remove that import and just use traceback module to get stacktrace.

Thank you for the explanation! Think I've made the changes accordingly.

[T4rk1n]

💃 Looks good, thank you.

[alexcjohnson]

Thank you @deepyaman 🙇