feat: 🔥 write aws-service test code & remove duplicated service

[okinawaa]

Service name "Cognito" was duplicated in aws-service.json so I remove one and there isn't test code which verify aws-service function so I wrote it

BREAKING CHANGE: 🧨 no

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Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngneat/falso/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

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[okinawaa]

float.spec.ts
Tests sometimes fail. It's extremely dangerous to fail in some cases, not always, so I'll fix it!

[okinawaa]

Typically, a decimal point occurs, but that's the result we want, but it can also be an integer.

[okinawaa]

If PR #321 is merged, this CI failure will be resolved.