TST: Add test for inline images (#758)

Credits to Sebastian Krause for creating the PDF:
#331 (comment)

Co-authored-by: Sebastian Krause <sebastian@realpath.org>

Author: MartinThoma

Resources/reportlab-inline-image.pdf

@@ -21,6 +21,7 @@
         ),
         (os.path.join(RESOURCE_ROOT, "imagemagick-images.pdf"), None),
         (os.path.join(RESOURCE_ROOT, "imagemagick-lzw.pdf"), None),
+        (os.path.join(RESOURCE_ROOT, "reportlab-inline-image.pdf"), None),
     ],
     ids=[
         "crazyones",
@@ -29,6 +30,7 @@
         "libreoffice-writer-password",
         "imagemagick-images",
         "imagemagick-lzw",
+        "reportlab-inline-image"
     ],
 )
 def test_page_operations(pdf_path, password):