fix(plugins): install signal handlers via PACT_CORE_PLUGINS_SIGNAL_HA… #92

Job	Run time
build-release (x86_64-unknown-linux-gnu)	6m 1s
build-release (x86_64-unknown-linux-musl)	7m 49s
build-release (aarch64-unknown-linux-gnu)	4m 59s
build-release (aarch64-unknown-linux-musl)	8m 35s
build-release (x86_64-pc-windows-msvc)	10m 51s
build-release (aarch64-pc-windows-msvc)	10m 24s
build-release (x86_64-apple-darwin)	6m 57s
build-release (aarch64-apple-darwin)	4m 43s
publish	0s
	1h 0m 19s

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