Drop support for below julia v1.5?

[nsajko]

While looking into integrating CheckedSizeProduct.jl, I noticed PtrArrays.jl still supports Julia v1.0. Would you be open to increasing the compat bound?

The issue is that Julia before v1.5 doesn't support this syntax for constructing NamedTuple:

v = 3
(; v)

Also, Julia before v1.2 doesn't support test/Project.toml.

[LilithHafner]

Distributions (minimum Julia version 1.3) and StatsBase (minimum Julia version 1.0) both depend on this package indirectly via AliasTables.jl.

If those packages drop support for Julia <1.5 then I'd be willing to here as well.