Bump github.com/spf13/pflag from 1.0.6 to 1.0.7 #1679

Job	Run time
run-determination	3s
check-outdated (ruledocsgen)	15s
check-outdated (docsgen)	18s
check-style (./)	31s
check-outdated (./)	17s
check-style (ruledocsgen)	33s
check-formatting (ruledocsgen)	15s
check-formatting (./)	15s
check-errors (./)	44s
check-errors (docsgen)	50s
check-style (docsgen)	25s
check-formatting (docsgen)	20s
check-errors (ruledocsgen)	51s
check-config (./)	23s
check-config (docsgen)	19s
check-config (ruledocsgen)	19s
	6m 38s

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