🔖 concrexit v27

Errors resolved

• Edited some translations (!1377 (merged))
• Fix localized overview placeholder thumbnail (!1376 (merged))
• Localize committee picture placeholders (!1370 (merged)) activemembers
• Fix dataminimisation to no longer remove website (!1369 (merged))
• Add birthday as readonly field to edit profile page (!1368 (merged))
• Fixed data not being properly sent to the calendar (!1367 (merged))
• Resolve "Mailing lists api fails without boards" (!1366 (merged))
• Prevent thumbnailing crashes when original is missing (!1363 (merged))
• Change behaviour of starting year field in registrations (!1358 (merged))
• Allow empty values in event registrations API (!1353 (merged)) api
• Add example to student number field (!1351 (merged))
• Remove FontAwesome as .form-control font-family (!1349 (merged))

New functionality

• Add search functionality to the events API (!1371 (merged)) api events
• Resolve "Add descriptions to mailing lists" (!1361 (merged)) mailinglists
• Add user-facing payments overview (!1350 (merged)) payments

Technical changes

• Update dependency Pillow to ~6.2 (!1365 (merged))
• Revisit url schemes (!1362 (merged)) refactor
• Update dependency pylint to ~2.4 (!1359 (merged))
• Update dependency sentry-sdk to ~0.12.0 (!1357 (merged))
• Update dependency django-bootstrap4 to v1 (!1338 (merged))

Other

• Update dependency firebase-admin to v3 (!1352 (merged))