Upgrade Pytest version to 7.1

[akhildevelops]

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Ubuntu 22.04
• Poetry version: 1.1.15

Issue

Running pytest (^5.2) on default poetry project gives error: TypeError: required field "lineno" missing from alias.

It got to do with bug in python 3.10 [https://github.com/pytest-dev/pytest/pull/8540].

There's a fix for pytest given in version ^6.0. Checked with latest pytest version 7.1 there's no issue.

It also makes sense to upgrade pytest as 5.2 dates back to Sep 2019

[Secrus]

Since we release 1.2 tomorrow, we don't plan to apply any more changes to the 1.1 branch. This problem does not exist on 1.2+, as we don't install pytest in default projects.

[github-actions]

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