The V66 maven does not compile the Metadata WSDL correctly.

[dmerrett-platinum7]

C:\Data_Work_ Code_Salesforce WSC>java -cp . -jar force-wsc-66.0.0-uber.jar metaWSDLv66.wsdl meta66.jar
[WSC][wsdlc.main:72]Generating Java files from schema ...
[WSC][wsdlc.main:72]Generated 2539 java files.
Error at Line: 174, ',', '}', or ';' expected in C:\Users\doug\AppData\Local\Temp\wsc-scratch11750966103498185553tmp\com\sforce\soap\metadata\ExternalDataSourceType.java
Error: Failed to compile