Allow PNI in PendingMember #974

Job	Run time
Build (libsignal-service-actix, Rust stable)	1m 41s
Check code formatting	4s
Build (libsignal-service-actix, Rust beta)	1m 40s
Clippy (libsignal-service-actix)	1m 21s
Build (libsignal-service-actix, Rust nightly)	4m 7s
Clippy (libsignal-service-hyper)	1m 10s
Build (libsignal-service-hyper, Rust stable)	1m 52s
Clippy (libsignal-service-hyper, unsend-futures)	1m 8s
Build (libsignal-service-hyper, Rust stable)	2m 3s
Clippy (libsignal-service)	1m 3s
Build (libsignal-service-hyper, Rust beta)	1m 31s
Clippy (libsignal-service, unsend-futures)	1m 16s
Build (libsignal-service-hyper, Rust nightly)	3m 51s
Build (libsignal-service, Rust stable)	1m 14s
Build (libsignal-service, Rust stable)	1m 35s
Build (libsignal-service, Rust beta)	1m 13s
Build (libsignal-service, Rust nightly)	3m 8s
Build (libsignal-service-actix, Rust 1.75)	2m 17s
	32m 14s

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