ObjFW  History of utils/ofzip/GZIPArchive.m of 31fcfcffcd3c45ba

This removes all query methods and replaces them by a single one that
returns a dictionary. Not only does this allow querying multiple
attributes at once, it is also more extensible, as the previous
attributes were specific to file URLs. file: [b351c0ed90] check-in: [34fe205b84] user: js, branch: trunk, size: 3856 [annotate] [blame] [check-ins using] [diff]

Instead, explicitly declare them, as OF_ASSUME_NONNULL_{BEGIN,END} does
not apply to implicit return types. This means that after this commit,
all init methods have a nonnull return type, as they should have. file: [c97ab3d19b] check-in: [2f4e0df8be] user: js, branch: trunk, size: 3639 [annotate] [blame] [check-ins using] [diff]

Not supported for any file formats, yet. file: [39d718e85f] check-in: [41949ecc65] user: js, branch: trunk, size: 3625 [annotate] [blame] [check-ins using] [diff]

This removes "b" for binary and always uses binary, as there is no good
reason to not use binary. file: [081b9cc60a] check-in: [23e57c5040] user: js, branch: trunk, size: 3530 [annotate] [blame] [check-ins using] [diff]

Casts are now written like types in variable declarations. file: [b72f242916] check-in: [4af49a13c3] user: js, branch: trunk, size: 3585 [annotate] [blame] [check-ins using] [diff]

Forgot to add 2017, even though I already did quite some changes in
2017. file: [5a9641513d] check-in: [44f45c2e35] user: js, branch: trunk, size: 3236 [annotate] [blame] [check-ins using] [diff]