fix: Revert preventDefault polyfill

[pmdartus]

Details

Revert CustomEvent.prototype.preventDefault polyfill change by upgrading the proxy-compat version to 0.17.39

Does this PR introduce a breaking change?

• Yes
• No

[salesforce-best-lwc-internal]

Benchmark comparison

Base commit: f78a335 | Target commit: 5bf12fb

benchmark	base(f78a335)	target(5bf12fb)	trend
table-append-1k.benchmark:benchmark-table/append/1k	247.38 (± 3.27 ms)	253.91 (± 5.41 ms)	👎
table-clear-1k.benchmark:benchmark-table/clear/1k	11.59 (± 0.35 ms)	13.89 (± 0.48 ms)	👎
table-create-10k.benchmark:benchmark-table/create/10k	1414.65 (± 13.26 ms)	1477.69 (± 21.97 ms)	👎
table-create-1k.benchmark:benchmark-table/create/1k	149.97 (± 2.35 ms)	155.74 (± 3.27 ms)	👎
table-update-10th-1k.benchmark:benchmark-table/update-10th/1k	124.04 (± 2.15 ms)	129.66 (± 2.11 ms)	👎
tablecmp-append-1k.benchmark:benchmark-table-component/append/1k	352.23 (± 6.14 ms)	330.77 (± 4.49 ms)	👍
tablecmp-clear-1k.benchmark:benchmark-table/clear/1k	34.87 (± 1.59 ms)	32.26 (± 1.23 ms)	👍
tablecmp-create-10k.benchmark:benchmark-table-component/create/10k	2495.40 (± 22.68 ms)	2588.80 (± 40.38 ms)	👎
tablecmp-create-1k.benchmark:benchmark-table-component/create/1k	266.14 (± 1.69 ms)	271.99 (± 5.17 ms)	👎
tablecmp-update-10th-1k.benchmark:benchmark-table-component/update-10th/1k	112.53 (± 3.16 ms)	121.19 (± 3.20 ms)	👎