test(chain): `batch_insert_relevant` inserts conflicting tx #284

Job	Run time
Build and test (stable, true, --no-default-features --features miniscript/no-std)	57s
Check no_std	24s
Build & Test Examples (example_cli)	26s
Build and test (stable, true, --all-features)	56s
Build and test (1.63.0, --no-default-features --features miniscript/no-std)	58s
Build & Test Examples (example_bitcoind_rpc_polling)	36s
Check WASM	39s
Build & Test Examples (example_electrum)	47s
Rust fmt	13s
Build and test (1.63.0, --all-features)	40s
Build & Test Examples (example_esplora)	47s
prepare	4s
Build & Test Examples (example_wallet_electrum)	57s
Build & Test Examples (example_wallet_esplora_async)	56s
Build & Test Examples (example_wallet_esplora_blocking)	46s
Build & Test Examples (example_wallet_rpc)	43s
clippy_check	40s
	11m 29s

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