tapcfg: bump minimalCompatibleVersion

To support the new `min_relay_fee_sat_per_kw` in the `lnd` RPC call
`EstimateFee`, we need to bump the `minimalCompatibleVersion` to
`0.18.4`.

Author: gijswijs

tapcfg/config.go

@@ -186,8 +186,8 @@ var (
 	// required in lnd to run tapd.
 	minimalCompatibleVersion = &verrpc.Version{
 		AppMajor: 0,
-		AppMinor: 17,
-		AppPatch: 99,
+		AppMinor: 18,
+		AppPatch: 4,
 
 		// We don't actually require the invoicesrpc calls. But if we
 		// try to use lndclient on an lnd that doesn't have it enabled,