wrong import

[kacperChwialkowski]

https://github.com/oxmlcs/kerpy/blob/50b175961d13e0e1f625aa987ae41cb98bfe4d84/independence_testing/ExampleHSIC.py#L15

that should be from independence_testing.HSICTestObject import HSICTestObject

[kacperChwialkowski]

same applies to the line above