build: remove deprecated type deps

[aradwann]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• 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?

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

What is the current behavior?

the packages:
"@types/redis": "4.0.11",
"@types/reflect-metadata": "0.1.0"
are deprecated and the libraries provide their own types, so those won't be needed

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build e8eecd0e-862c-43be-a891-b37c9c503993

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.404%

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Totals
Change from base Build a213a525-4c5b-48ee-9803-b76e72178509:	0.0%
Covered Lines:	6202
Relevant Lines:	6640

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💛 - Coveralls

[kamilmysliwiec]

LGTM