Fix Windows UNC Path issues

[sebthom]

This partially addresses #162 To fully resolve the issue of supporting Windows UNC paths the inclusion of a new LSP4E release with this patch is required: eclipse-lsp4e/lsp4e#1360

I tested it first only with the fix in LSP4E. While it fixed the outline view in JS/TS files, the ESLint server still failed to start with:

java.lang.IllegalArgumentException: URI has an authority component  at java.base/java.io.File.<init>(File.java:425)
  at org.eclipse.wildwebdeveloper.eslint.ESLintClientImpl.configuration(ESLintClientImpl.java:57)
  at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
  at java.base/java.lang.reflect.Method.invoke(Method.java:580)
  at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
  at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:128)
  at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:271)
  at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:201)
  at org.eclipse.lsp4e.LanguageServerWrapper.lambda$3(LanguageServerWrapper.java:415)
  at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
  at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
  at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)