Upgrade to FunctionImplementations v0.4

[mtfishman]

Closes #201, closes #202, closes #203, closes #204.

[codecov]

Codecov Report

❌ Patch coverage is 73.07692% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.91%. Comparing base (10e69a2) to head (cbb83da).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/abstractblocksparsearray/unblockedsubarray.jl	0.00%	2 Missing ⚠️
...ksparsearrayinterface/blocksparsearrayinterface.jl	33.33%	2 Missing ⚠️
src/blocksparsearrayinterface/broadcast.jl	85.71%	2 Missing ⚠️
src/abstractblocksparsearray/broadcast.jl	75.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #205   +/-   ##
=======================================
  Coverage   71.91%   71.91%           
=======================================
  Files          36       36           
  Lines        2026     2026           
=======================================
  Hits         1457     1457           
  Misses        569      569           

Flag	Coverage Δ
docs	5.84% <17.39%> (ø)

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