www/waterfox: update to 56.0.3.50
- Apply more FF58 fixes except the following https://bugzilla.mozilla.org/buglist.cgi?bug_id=1281965,1379276,1382851,1390882,1396399,1412653,1413857,1415770,1415788,1416879,1418074,1418841,1418966,1420049,1421099,1421324,1426449
Changes: https://github.com/MrAlex94/Waterfox/compare/56.0.3...52216f01e1f3
Security: a891c5b4-3d7a-4de9-9c71-eef3fd698c77