#549 replace deprecated property

see https://github.com/ACINQ/eclair/issues/1505

code/docker/eclair/eclair/eclair.conf

@@ -23,6 +23,11 @@ eclair {
     zmqblock = "tcp://bitcoind:12005"
     zmqtx = "tcp://bitcoind:12006"
   }
-
-  on-chain-fees.max-feerate-mismatch = 100
+  
+  on-chain-fees {
+    feerate-tolerance {
+      ratio-low = 0.000001
+      ratio-high = 1000000
+    }
+  }
 }