v0.12.6

BlockBandedMatrices v0.12.6

Diff since v0.12.5

Merged pull requests:

• import materialize from ArrayLayouts (#167) (@jishnub)
• update test for Broadcast.materialize (#168) (@jishnub)
• Add badges to README.md (#169) (@jishnub)
• Bump actions/checkout from 3 to 4 (#170) (@dependabot[bot])
• Don't error in lmul!/rmul! with non-zero entries (#171) (@dlfivefifty)