Enable chaining

Author: SSlinky

server/src/project/document.ts

@@ -112,6 +112,7 @@ export abstract class BaseProjectDocument {
 
 	registerDiagnosticElement(element: HasDiagnosticCapability) {
 		this._hasDiagnosticElements.push(element);
+		return this;
 	}
 
 	/**

server/src/project/parser/vbaSyntaxParser.ts

@@ -141,6 +141,7 @@ class VbaTreeWalkListener implements vbaListener {
     enterModule = (ctx: ModuleContext) => {
         const element = new ModuleElement(ctx, this.document.textDocument, this.document.symbolKind);
         this.document.registerAttributeElement(element)
+            .registerDiagnosticElement(element)
             .registerScopedElement(element);
     };