fix: cannot assign to read only property exports of object

[kristw]

CATEGORY

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SUMMARY

Fix the issue when npm link plugins

Uncaught TypeError: Cannot assign to read only property 'exports' of object '#<Object>'

TEST PLAN

Try npm link plugins

REVIEWERS

@suddjian @rusackas

[codecov-io]

Codecov Report

Merging #9319 into master will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #9319      +/-   ##
==========================================
+ Coverage   59.08%   59.15%   +0.07%     
==========================================
  Files         374      374              
  Lines       12205    12168      -37     
  Branches     2989     2872     -117     
==========================================
- Hits         7211     7198      -13     
- Misses       4815     4970     +155     
+ Partials      179        0     -179

Impacted Files	Coverage Δ
...hboard/components/resizable/ResizableContainer.jsx	67.79% <0%> (-2.52%)	⬇️
...explore/components/AdhocMetricEditPopoverTitle.jsx	68.96% <0%> (-1.04%)	⬇️
...src/dashboard/components/HeaderActionsDropdown.jsx	68.88% <0%> (-0.68%)	⬇️
...nd/src/dashboard/components/gridComponents/Tab.jsx	66.17% <0%> (-0.5%)	⬇️
...erset-frontend/src/SqlLab/components/SqlEditor.jsx	51.65% <0%> (-0.3%)	⬇️
superset-frontend/src/components/EditableTitle.jsx	80% <0%> (-0.29%)	⬇️
...et-frontend/src/SqlLab/components/TableElement.jsx	82.55% <0%> (-0.21%)	⬇️
...c/dashboard/components/gridComponents/Markdown.jsx	91.66% <0%> (-0.12%)	⬇️
...tend/src/dashboard/util/getFilterScopeNodesTree.js	2.38% <0%> (ø)	⬆️
superset-frontend/src/setup/setupClient.js	0% <0%> (ø)	⬆️
... and 56 more

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[rusackas]

LGTM! Tested locally and it seems to be working better. Thank you for resolving this!