Makefile: update spec version

This includes the new bolt11 test vectors, and also removes the
requirement that HTLCs be less than 2^32 msat.  We keep that for now
because Electrum enforced it on receive: in two releases we will stop
that too.

So no longer warn about needing mpp in that case either.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Deprecated: Protocol: No longer restrict HTLCs to

devtools/mkcommit.c

@@ -408,6 +408,7 @@ int main(int argc, char *argv[])
 				   &funding_localkey, &funding_remotekey,
 				   option_static_remotekey,
 				   option_anchor_outputs,
+				   false,
 				   fee_payer);
 
 	if (!channel_force_htlcs(channel,