Images of apple, mikan, money as fixture are too small

[kazurayam]

See https://github.com/kazurayam/inspectus/tree/0.5.5/core/src/test/fixtures/images

For example:

These are too small. These are expanded in the HTML report, and looks bad, like this

[kazurayam]

A quick fix is to replace the image files with larger size

[kazurayam]

I changed the image files:

Now they look fine.

[kazurayam]

done at 0.6.0