Merge branch 'patch-1' into 'master'

Reuse an existing window.PagedConfig instance

Closes #3

See merge request tools/pagedjs-cli!3

src/printer.js

@@ -103,9 +103,8 @@ class Printer extends EventEmitter {
     }
 
     await page.evaluate(() => {
-      window.PagedConfig = {
-        auto: false
-      }
+      window.PagedConfig = window.PagedConfig || {};
+      window.PagedConfig.auto = false;
     });