Prevent misaligned pointer dereference in Range

[iciivy]

Using a Range<u16, 1, 1000> as a command argument panics with the following error: misaligned pointer dereference: address must be a multiple of 0x8 but is 0x8442bdbfae.

This PR should fix this.

Note that to be able to compile the project locally, I had to add an additional #[allow(invalid_reference_casting)] in the context.rs file.

[AlvaroMS25]

Sorry about that and thanks for correcting it!
I'll be publishing a new version with these changes in a few days alongside some other changes