Retain updated Estimator in Corrector-generated MetaResults

[tsalo]

Closes None.

Changes proposed in this pull request:

• Copy an updated version of the Estimator into the updated MetaResult object returned by Correctors, so that the updated MetaResult will have access to any new null distributions or other updated attributes that may be present in the Estimator after its been run through multiple comparisons correction.

To do:

• Figure out why the uncorrected MetaResult's Estimator has Corrector-generated null distributions.

Here's what the changes mean:

from nimare.meta import MKDADensity
from nimare.correct import FWECorrector

# assuming we already have a Dataset as the variable "dset"
meta = MKDADensity()
results = meta.fit(dset)
corrector = FWECorrector(method="montecarlo", n_iters=10000)
cresults = corrector.transform(results)

# We shouldn't see the FWE null distributions in the original Estimator
print(meta.null_distributions_.keys())

# Nor in the original MetaResult's Estimator
print(results.estimator.null_distributions_.keys())

# But we should see it in the updated MetaResult's Estimator
print(cresults.estimator.null_distributions_.keys())

[codecov]

Codecov Report

Merging #633 (2a27255) into main (0c67c5e) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #633   +/-   ##
=======================================
  Coverage   87.89%   87.89%           
=======================================
  Files          40       40           
  Lines        4319     4320    +1     
=======================================
+ Hits         3796     3797    +1     
  Misses        523      523           

Impacted Files	Coverage Δ
nimare/correct.py	92.04% <100.00%> (+0.09%)	⬆️

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