Increase deafult gas limit to 600K

Trust/Transfer/Types/GasLimitConfiguration.swift

@@ -6,5 +6,5 @@ import BigInt
 public struct GasLimitConfiguration {
     static let `default` = BigInt(90_000)
     static let min = BigInt(21_000)
-    static let max = BigInt(400_000)
+    static let max = BigInt(600_000)
 }

TrustTests/Transfer/Types/GasLimitConfigurationTests.swift

@@ -9,6 +9,6 @@ class GasLimitConfigurationTests: XCTestCase {
     func testDefault() {
         XCTAssertEqual(BigInt(90000), GasLimitConfiguration.default)
         XCTAssertEqual(BigInt(21000), GasLimitConfiguration.min)
-        XCTAssertEqual(BigInt(400000), GasLimitConfiguration.max)
+        XCTAssertEqual(BigInt(600000), GasLimitConfiguration.max)
     }
 }