Bump xChangeVersion from 4.4.2 to 5.1.1

Bumps `xChangeVersion` from 4.4.2 to 5.1.1.

Updates `org.knowm.xchange:xchange-core` from 4.4.2 to 5.1.1
- [Commits](knowm/XChange@xchange-4.4.2...xchange-5.1.1)

Updates `org.knowm.xchange:xchange-bitfinex` from 4.4.2 to 5.1.1
- [Commits](knowm/XChange@xchange-4.4.2...xchange-5.1.1)

Updates `org.knowm.xchange:xchange-itbit` from 4.4.2 to 5.1.1
- [Commits](knowm/XChange@xchange-4.4.2...xchange-5.1.1)

Updates `org.knowm.xchange:xchange-coinbase` from 4.4.2 to 5.1.1
- [Commits](knowm/XChange@xchange-4.4.2...xchange-5.1.1)

Updates `org.knowm.xchange:xchange-coinbasepro` from 4.4.2 to 5.1.1
- [Commits](knowm/XChange@xchange-4.4.2...xchange-5.1.1)

Updates `org.knowm.xchange:xchange-bittrex` from 4.4.2 to 5.1.1
- [Commits](knowm/XChange@xchange-4.4.2...xchange-5.1.1)

---
updated-dependencies:
- dependency-name: org.knowm.xchange:xchange-core
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.knowm.xchange:xchange-bitfinex
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.knowm.xchange:xchange-itbit
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.knowm.xchange:xchange-coinbase
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.knowm.xchange:xchange-coinbasepro
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.knowm.xchange:xchange-bittrex
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

consensusj-exchange/build.gradle

@@ -2,7 +2,7 @@ plugins {
     id 'java-library'
 }
 
-def xChangeVersion = '4.4.2'
+def xChangeVersion = '5.1.1'
 
 dependencies {
     api "javax.money:money-api:${javaMoneyApiVersion}"