Changed bytes31 casts to use libfunc upcast.

[orizi]

Changes the upcast libfunc which is already allowed. #should_audit

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This change is 

[liorgold2]

Reviewed 2 of 3 files at r1, 1 of 1 files at r2.
Reviewable status: all files reviewed (commit messages unreviewed), 1 unresolved discussion (waiting on @orizi and @yuvalsw)

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tests/e2e_test_data/libfuncs/bytes31 line 155 at r2 (raw file):

//! > ==========================================================================

//! > upcast<u8, bytes31>

I think one is enough.

[liorgold2]

Reviewed all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @orizi and @yuvalsw)

[orizi]

Reviewable status: 2 of 3 files reviewed, 1 unresolved discussion (waiting on @liorgold2 and @yuvalsw)

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tests/e2e_test_data/libfuncs/bytes31 line 155 at r2 (raw file):

Previously, liorgold2 wrote…

I think one is enough.

Done.

[liorgold2]

Reviewed 2 of 2 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @yuvalsw)

[liorgold2]

Reviewed 1 of 1 files at r4, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @yuvalsw)