Update pympipool requirement from ~=0.7.13 to ~=0.8.4

[dependabot[bot]]

Updates the requirements on pympipool to permit the latest version.

Release notes

Sourced from pympipool's releases.

pympipool 0.8.4

What's Changed

• Explain install AMD by @​jan-janssen in pyiron/pympipool#331
• Test Openmpi 4.1.6 by @​jan-janssen in pyiron/pympipool#333
• Update ruff to 0.4.5 by @​jan-janssen in pyiron/pympipool#336
• Remove openmpi specific environment variables by @​jan-janssen in pyiron/pympipool#335
• Benchmark remove environment variables by @​jan-janssen in pyiron/pympipool#338
• Add type hints for input check by @​jan-janssen in pyiron/pympipool#339
• Docstring fixes by @​jan-janssen in pyiron/pympipool#340
• Add validate backend fucntion by @​jan-janssen in pyiron/pympipool#341
• Release openmpi constraint - Test with openmpi 5.0 by @​jan-janssen in pyiron/pympipool#337

Full Changelog: https://github.com/pyiron/pympipool/compare/pympipool-0.8.3...pympipool-0.8.4

Commits

• 635acdb Merge pull request #337 from pyiron/release_openmpi_constraint
• 4af4e97 Merge remote-tracking branch 'refs/remotes/origin/main' into release_openmpi_...
• 75613c1 Merge pull request #341 from pyiron/validate_backend
• 5c05f5f [pre-commit.ci] auto fixes from pre-commit.com hooks
• 9b2884a Add validate backend fucntion
• ed541e0 Update continous integration environment
• 9377818 Merge remote-tracking branch 'origin/release_openmpi_constraint' into release...
• 1caa277 update documentation
• 5446731 Add files via upload
• 056653c [pre-commit.ci] auto fixes from pre-commit.com hooks
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #18.