CompatHelper: bump compat for "BlockBandedMatrices" to "0.9" (#46)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

Project.toml

@@ -30,7 +30,7 @@ ToeplitzMatrices = "c751599d-da0a-543b-9d20-d0a503d91d24"
 AbstractFFTs = "0.4, 0.5"
 BandedMatrices = "0.14, 0.15"
 BlockArrays = "0.12.11"
-BlockBandedMatrices = "0.7, 0.8"
+BlockBandedMatrices = "0.7, 0.8, 0.9"
 Calculus = "0.5"
 DSP = "0.6"
 DomainSets = "0.3, 0.4"