Add Pipenv support with configuration options and environment managem… #5

Job	Run time
Performance Baseline (windows-latest, x86_64-pc-windows-msvc)	6m 19s
Performance Baseline (ubuntu-latest, x86_64-unknown-linux-musl)	3m 6s
Performance Baseline (macos-latest, x86_64-apple-darwin)	7m 15s
	16m 40s

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