Use ESLint to ensure that exports are sorted alphabetically

There's built-in ESLint rule, see `sort-imports`, to ensure that all `import`-statements are sorted alphabetically, since that often helps with readability.
Unfortunately there's no corresponding rule to sort `export`-statements alphabetically, however there's an ESLint plugin which does this; please see https://www.npmjs.com/package/eslint-plugin-sort-exports

The only downside here is that it's not automatically fixable, but the re-ordering is a one-time "cost" and the plugin will help maintain a *consistent* ordering of `export`-statements in the future.
*Note:* To reduce the possibility of introducing any errors here, the re-ordering was done by simply selecting the relevant lines and then using the built-in sort-functionality of my editor.

web/app.js

@@ -3480,7 +3480,7 @@ const PDFPrintServiceFactory = {
 };
 
 export {
-  PDFViewerApplication,
   DefaultExternalServices,
   PDFPrintServiceFactory,
+  PDFViewerApplication,
 };

web/interfaces.js

@@ -238,10 +238,10 @@ class IL10n {
 }
 
 export {
-  IPDFLinkService,
-  IPDFHistory,
-  IRenderableView,
-  IPDFTextLayerFactory,
-  IPDFAnnotationLayerFactory,
   IL10n,
+  IPDFAnnotationLayerFactory,
+  IPDFHistory,
+  IPDFLinkService,
+  IPDFTextLayerFactory,
+  IRenderableView,
 };

web/pdf_history.js

@@ -804,4 +804,4 @@ function isDestArraysEqual(firstDest, secondDest) {
   return true;
 }
 
-export { PDFHistory, isDestHashesEqual, isDestArraysEqual };
+export { isDestArraysEqual, isDestHashesEqual, PDFHistory };

web/pdf_rendering_queue.js

@@ -183,4 +183,4 @@ class PDFRenderingQueue {
   }
 }
 
-export { RenderingStates, PDFRenderingQueue };
+export { PDFRenderingQueue, RenderingStates };

web/pdf_sidebar.js

@@ -517,4 +517,4 @@ class PDFSidebar {
   }
 }
 
-export { SidebarView, PDFSidebar };
+export { PDFSidebar };

web/pdf_viewer.component.js

@@ -37,20 +37,20 @@ const pdfjsVersion = PDFJSDev.eval("BUNDLE_VERSION");
 const pdfjsBuild = PDFJSDev.eval("BUNDLE_BUILD");
 
 export {
-  PDFViewer,
-  PDFSinglePageViewer,
-  PDFPageView,
-  PDFLinkService,
-  SimpleLinkService,
-  TextLayerBuilder,
-  DefaultTextLayerFactory,
   AnnotationLayerBuilder,
   DefaultAnnotationLayerFactory,
-  PDFHistory,
-  PDFFindController,
-  EventBus,
+  DefaultTextLayerFactory,
   DownloadManager,
-  ProgressBar,
+  EventBus,
   GenericL10n,
   NullL10n,
+  PDFFindController,
+  PDFHistory,
+  PDFLinkService,
+  PDFPageView,
+  PDFSinglePageViewer,
+  PDFViewer,
+  ProgressBar,
+  SimpleLinkService,
+  TextLayerBuilder,
 };

web/text_layer_builder.js

@@ -463,4 +463,4 @@ class DefaultTextLayerFactory {
   }
 }
 
-export { TextLayerBuilder, DefaultTextLayerFactory };
+export { DefaultTextLayerFactory, TextLayerBuilder };

web/ui_utils.js

@@ -1031,46 +1031,46 @@ function getActiveOrFocusedElement() {
 }
 
 export {
+  animationStarted,
+  approximateFraction,
   AutoPrintRegExp,
+  backtrackBeforeAllVisibleElements, // only exported for testing
+  binarySearchFirstItem,
   CSS_UNITS,
-  DEFAULT_SCALE_VALUE,
   DEFAULT_SCALE,
-  MIN_SCALE,
-  MAX_SCALE,
-  UNKNOWN_SCALE,
-  MAX_AUTO_SCALE,
-  SCROLLBAR_PADDING,
-  VERTICAL_PADDING,
+  DEFAULT_SCALE_VALUE,
+  EventBus,
+  getActiveOrFocusedElement,
+  getOutputScale,
+  getPageSizeInches,
+  getPDFFileNameFromURL,
+  getVisibleElements,
+  isPortraitOrientation,
   isValidRotation,
   isValidScrollMode,
   isValidSpreadMode,
-  isPortraitOrientation,
-  PresentationModeState,
-  SidebarView,
-  RendererType,
-  TextLayerMode,
-  ScrollMode,
-  SpreadMode,
-  NullL10n,
-  EventBus,
-  ProgressBar,
-  getPDFFileNameFromURL,
-  noContextMenuHandler,
-  parseQueryString,
-  backtrackBeforeAllVisibleElements, // only exported for testing
-  getVisibleElements,
-  roundToDivide,
-  getPageSizeInches,
-  approximateFraction,
-  getOutputScale,
-  scrollIntoView,
-  watchScroll,
-  binarySearchFirstItem,
-  normalizeWheelEventDirection,
-  normalizeWheelEventDelta,
-  animationStarted,
-  WaitOnType,
-  waitOnEventOrTimeout,
+  MAX_AUTO_SCALE,
+  MAX_SCALE,
+  MIN_SCALE,
   moveToEndOfArray,
-  getActiveOrFocusedElement,
+  noContextMenuHandler,
+  normalizeWheelEventDelta,
+  normalizeWheelEventDirection,
+  NullL10n,
+  parseQueryString,
+  PresentationModeState,
+  ProgressBar,
+  RendererType,
+  roundToDivide,
+  SCROLLBAR_PADDING,
+  scrollIntoView,
+  ScrollMode,
+  SidebarView,
+  SpreadMode,
+  TextLayerMode,
+  UNKNOWN_SCALE,
+  VERTICAL_PADDING,
+  waitOnEventOrTimeout,
+  WaitOnType,
+  watchScroll,
 };