eth_filter fix lint and tests

src/main/kotlin/io/emeraldpay/dshackle/upstream/Selector.kt

@@ -413,6 +413,5 @@ class Selector {
             if (other !is SameNodeMatcher) return false
             return other.upstreamHash == upstreamHash
         }
-
     }
 }

src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/EthereumCallSelector.kt

@@ -69,7 +69,7 @@ class EthereumCallSelector(
             return Mono.empty()
         }
         val filterId = list[0].toString()
-        if(filterId.length < 4) {
+        if (filterId.length < 4) {
             return Mono.just(Selector.SameNodeMatcher(0.toByte()))
         }
         val hashHex = filterId.substring(filterId.length - 2)