Allow PNI in PendingMember #973

Job	Run time
Check code formatting	3s
Clippy (libsignal-service-actix)	1m 13s
Build (libsignal-service-actix, Rust stable)	1m 31s
Build (libsignal-service-actix, Rust beta)	1m 33s
Clippy (libsignal-service-hyper)	1m 10s
Build (libsignal-service-actix, Rust nightly)	1m 40s
Clippy (libsignal-service-hyper, unsend-futures)	1m 40s
Build (libsignal-service-hyper, Rust stable)	1m 14s
Clippy (libsignal-service)	59s
Build (libsignal-service-hyper, Rust stable)	1m 17s
Clippy (libsignal-service, unsend-futures)	57s
Build (libsignal-service-hyper, Rust beta)	1m 18s
Build (libsignal-service-hyper, Rust nightly)	1m 13s
Build (libsignal-service, Rust stable)	1m 7s
Build (libsignal-service, Rust stable)	1m 10s
Build (libsignal-service, Rust beta)	1m 10s
Build (libsignal-service, Rust nightly)	1m 12s
Build (libsignal-service-actix, Rust 1.75)	2m 2s
	22m 29s

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