Enable the dot-notation ESLint rule

*Please note:* These changes were done automatically, using the `gulp lint --fix` command.

This rule is already enabled in mozilla-central, see https://searchfox.org/mozilla-central/rev/567b68b8ff4b6d607ba34a6f1926873d21a7b4d7/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js#103-104

The main advantage, besides improved consistency, of this rule is that it reduces the size of the code (by 3 bytes for each case). In the PDF.js code-base there's close to 8000 instances being fixed by the `dot-notation` ESLint rule, which end up reducing the size of even the *built* files significantly; the total size of the `gulp mozcentral` build target changes from `3 247 456` to `3 224 278` bytes, which is a *reduction* of `23 178` bytes (or ~0.7%) for a completely mechanical change.

A large number of these changes affect the (large) lookup tables used on the worker-thread, but given that they are still initialized lazily I don't *think* that the new formatting this patch introduces should undo any of the improvements from PR 6915.

Please find additional details about the ESLint rule at https://eslint.org/docs/rules/dot-notation

web/pdf_print_service.js

@@ -66,7 +66,7 @@ function PDFPrintService(pdfDocument, pagesOverview, printContainer, l10n) {
   this.printContainer = printContainer;
   this.l10n = l10n || NullL10n;
   this.disableCreateObjectURL =
-    pdfDocument.loadingParams["disableCreateObjectURL"];
+    pdfDocument.loadingParams.disableCreateObjectURL;
   this.currentPage = -1;
   // The temporary canvas where renderPage paints one page at a time.
   this.scratchCanvas = document.createElement("canvas");