Bitcoin=2 Monero=10 default finality confirmations

It is currently not expected that ASB and CLI are used for swaps > 10_000$ equivalent to XMR/BTC, thus the finality confirmations were reduced to an equivalent of 20 mins of work (2 blocks for Bitcoin, 10 for Monero).
Monero enforces 10 unlocking blocks until the balance is spendable, so the finality confirmations cannot be set lower than 10.

swap/src/env.rs

@@ -44,13 +44,13 @@ impl GetConfig for Mainnet {
     fn get_config() -> Config {
         Config {
             bitcoin_lock_confirmed_timeout: 24.hours(),
-            bitcoin_finality_confirmations: 3,
+            bitcoin_finality_confirmations: 2,
             bitcoin_avg_block_time: 10.minutes(),
             bitcoin_cancel_timelock: CancelTimelock::new(72),
             bitcoin_punish_timelock: PunishTimelock::new(72),
             bitcoin_network: bitcoin::Network::Bitcoin,
             monero_avg_block_time: 2.minutes(),
-            monero_finality_confirmations: 15,
+            monero_finality_confirmations: 10,
             monero_network: monero::Network::Mainnet,
         }
     }
@@ -60,13 +60,13 @@ impl GetConfig for Testnet {
     fn get_config() -> Config {
         Config {
             bitcoin_lock_confirmed_timeout: 12.hours(),
-            bitcoin_finality_confirmations: 3,
+            bitcoin_finality_confirmations: 2,
             bitcoin_avg_block_time: 10.minutes(),
             bitcoin_cancel_timelock: CancelTimelock::new(12),
             bitcoin_punish_timelock: PunishTimelock::new(6),
             bitcoin_network: bitcoin::Network::Testnet,
             monero_avg_block_time: 2.minutes(),
-            monero_finality_confirmations: 15,
+            monero_finality_confirmations: 10,
             monero_network: monero::Network::Stagenet,
         }
     }