[BUG] changing axis type (linear <->logarithmic) doesn't change on chart.update()

[ldemailly]

Expected Behavior

changing the type and update() should change the display type

Current Behavior

stays linear

Possible Solution

workaround is to rewrite the dataset with a different axis id but that seems overkill (also I then have 2 axis showing)

Steps to Reproduce (for bugs)

https://codepen.io/anon/pen/GOWBpx

1. click the link
2. axis label changes, axis type does not

Context

I need to switch axis type to help visualize home drawn (x,y) histograms

Environment

• Chart.js version: latest aka 2.7.1
• Browser name and version: chrome, safari...
• Link to your project: https://github.com/istio/fortio

[ldemailly]

I actually can't seem to find any workaround
reverse direction: https://codepen.io/anon/pen/dZvjLK

[ldemailly]

Fixed in #4198