chore(deps): update dependency terser to v5.31.6 (master)

[mend-for-github-com]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
terser (source)	5.31.2 → 5.31.6

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Release Notes

terser/terser (terser)

v5.31.6

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• Retain side effects in a case when the expression is a sequence (comma) expression

v5.31.5

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• Revert v5.31.4, which created mysterious issues #​1548, #​1549

v5.31.4

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• drop_unused: drop classes which only have side effects in the extends part

v5.31.3

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• drop_unused: drop unused parameters from IIFEs in some more situations.

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