Extend unconditional_recursion lint to check for Default trait implementation

[GuillaumeGomez]

In case the Default trait is implemented manually and is calling a static method (let's call it a) and then a is using Self::default(), it makes an infinite call recursion difficult to see without debugging. This extension checks that there is no such recursion possible.

r? @llogiq

changelog: Extend unconditional_recursion lint to check for Default trait implementation

[GuillaumeGomez]

Fixed the clippy lints.

[llogiq]

Thank you!

@bors r+

[bors]

📌 Commit bf5c0d8 has been approved by llogiq

It is now in the queue for this repository.

[bors]

⌛ Testing commit bf5c0d8 with merge 8507e4c...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: llogiq
Pushing 8507e4c to master...