Include overloads in callgraph

[bacam]

Prevents declarations migrating past an overload that uses them

[github-actions[bot]]

Test Results

    9 files  ±0     20 suites  ±0   0s :stopwatch: ±0s   641 tests ±0    641 :white_check_mark: ±0  0 :zzz: ±0  0 :x: ±0  2 053 runs  ±0  2 052 :white_check_mark: ±0  1 :zzz: ±0  0 :x: ±0 

Results for commit 0e399a70. ± Comparison against base commit ee43f200.