feat: add USDPLUS support #490

Job	Run time
Run linters / lint-format-typecheck (pragma-utils)	48s
Build & Integration Tests / tests (pragma-utils)	11m 37s
Run linters / lint-format-typecheck (pragma-sdk)	40s
Build & Integration Tests / tests (pragma-sdk)	12m 47s
Run linters / lint-format-typecheck (price-pusher)	49s
Build & Integration Tests / tests (price-pusher)	1m 16s
Run linters / lint-format-typecheck (vrf-listener)	46s
Build & Integration Tests / tests (vrf-listener)	14m 34s
Run linters / lint-format-typecheck (checkpointer)	51s
Build & Integration Tests / tests (checkpointer)	12m 47s
Run linters / lint-format-typecheck (merkle-maker)	49s
Build & Integration Tests / tests (merkle-maker)	11m 42s
Run linters / lint-format-typecheck (lp-pricer)	54s
Build & Integration Tests / tests (lp-pricer)	11m 28s
	1h 21m 48s

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