Support the letters q and Q.

[kohei-noda-qcrg]

It is the implementation and its testing to resolve #144

Supports quadruple_precision expressions such as
r = 1.0Q-10

[kohei-noda-qcrg]

@gnikit
@awvwgk
Could you review if this feature is needed and its implementation?

[kohei-noda-qcrg]

@awvwgk
Some CIs failed, but the reason is due to the version of the ubuntu OS used in the test.

OS version

https://github.com/pseewald/fprettify/actions/runs/4161587117/jobs/7669164318#step:1:4
ubuntu-latest means ubuntu-22.04 LTS

Requirements for the failed test

https://github.com/pseewald/fprettify/blob/f5061b53459e1910c39a2b295c937624763ab15e/.github/workflows/test.yml#L88
pip workflows requires python 3.5 and 3.6.

Reasons for failure

actions/setup-python#544
However, according to this issue, ubuntu-22.04 LTS no longer supports python version ≤ 3.6.

Solution

I think there are two options to solve this problem

1. Temporary use ubuntu-20.04 image for CI.
2. use python version ≥ 3.7 for CI.

How should we solve this problem?

[gnikit]

We have some PRs in the pipeline updating the CI.

[kohei-noda-qcrg]

@gnikit
I see. I checked #135 is the pipeline upgrade pull request.

[gnikit]

Could you please rebase to the latest master?

[kohei-noda-qcrg]

Sure. I will rebase this pr to the latest master branch.

[kohei-noda-qcrg]

@gnikit
I rebased this pull request to the latest master branch.