fix(Exports): add 4 missing exports from MusicalScore/Graphical/Vexflow (#935)

fix #935

src/MusicalScore/Graphical/VexFlow/index.ts

@@ -1,5 +1,6 @@
 // created from 'create-ts-index'
 
+export * from "./AlignmentManager";
 export * from "./CanvasVexFlowBackend";
 export * from "./SvgVexFlowBackend";
 export * from "./VexFlowBackend";
@@ -11,6 +12,7 @@ export * from "./VexFlowInstantaneousDynamicExpression";
 export * from "./VexFlowInstrumentBrace";
 export * from "./VexFlowInstrumentBracket";
 export * from "./VexFlowMeasure";
+export * from "./VexFlowMultiRestMeasure";
 export * from "./VexFlowMusicSheetCalculator";
 export * from "./VexFlowMusicSheetDrawer";
 export * from "./VexFlowMusicSystem";
@@ -18,5 +20,7 @@ export * from "./VexFlowOctaveShift";
 export * from "./VexFlowSlur";
 export * from "./VexFlowStaffEntry";
 export * from "./VexFlowStaffLine";
+export * from "./VexflowStafflineNoteCalculator";
+export * from "./VexFlowTabMeasure";
 export * from "./VexFlowTextMeasurer";
 export * from "./VexFlowVoiceEntry";