add column names for compute_wavelet_transform

[sjvenditto]

Changes the output of compute_wavelet_transform such that, if returning a TsdFrame, the column names correspond to the input frequencies freqs (Issue #404)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
pynapple/core/_core_functions.py	83.33% <ø> (ø)
pynapple/core/base_class.py	97.60% <ø> (ø)
pynapple/core/config.py	82.22% <ø> (ø)
pynapple/core/interval_set.py	94.34% <ø> (ø)
pynapple/core/time_index.py	100.00% <ø> (ø)
pynapple/core/time_series.py	89.43% <ø> (ø)
pynapple/core/ts_group.py	92.85% <ø> (ø)
pynapple/core/utils.py	84.09% <ø> (ø)
pynapple/process/_process_functions.py	22.13% <ø> (ø)
pynapple/process/perievent.py	94.79% <ø> (ø)
... and 1 more