Merge rust-bitcoin/rust-bitcoin#3885: io: Allow setting position bigg… #4

Job	Run time
Test 32-bit version	55s
Docs - stable toolchain (recent)	1m 11s
Test - MSRV toolchain (minimal)	28m 16s
Prepare	3s
Test - MSRV toolchain (recent)	29m 5s
Kani codegen - stable toolchain	54s
WASM - stable toolchain	1m 38s
Cross test - stable toolchain	1m 39s
Test - stable toolchain (minimal)	18m 52s
Test - stable toolchain (recent)	18m 31s
Bench - nightly toolchain (recent)	1m 41s
Docs - nightly toolchain (recent)	1m 2s
ASAN - nightly toolchain (recent)	35s
API - nightly toolchain (recent)	1m 31s
Embedded - nightly toolchain	1m 9s
Lint - nightly toolchain (recent)	57s
Test - nightly toolchain (minimal)	15m 6s
Test - nightly toolchain (recent)	15m 42s
	2h 18m 47s

Provide feedback