Bump github.com/hashicorp/go-plugin from 1.4.10 to 1.5.0 #450

Job	Run time
cache-deps (linux)	1m 11s
cache-deps (windows)	8m 47s
artifacts (linux)	11m 3s
lint (linux)	14m 31s
images (linux)	13m 14s
unit-test (ubuntu-20.04)	10m 46s
unit-test (macos-latest)	11m 0s
unit-test (linux with race detection)	10m 40s
artifact (windows)	18m 15s
unit-test (windows)	24m 30s
lint (windows)	25m 15s
integration (linux) (5, 1)	12m 7s
integration (linux) (5, 2)	15m 20s
integration (linux) (5, 3)	13m 33s
integration (linux) (5, 4)	9m 1s
integration (linux) (5, 5)	12m 47s
images (windows)	3m 6s
integration (windows)	13m 58s
success	0s
	3h 49m 4s

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