extension/package-lock.json: npm audit fix

micromatch  <4.0.8
Severity: moderate
Regular Expression Denial of Service (ReDoS) in micromatch - GHSA-952p-6rrq-rcjv
fix available via `npm audit fix`
node_modules/micromatch

path-to-regexp  0.2.0 - 1.8.0
Severity: high
path-to-regexp outputs backtracking regular expressions - GHSA-9wv6-86v2-598j
fix available via `npm audit fix`
node_modules/path-to-regexp

2 vulnerabilities (1 moderate, 1 high)

Change-Id: Icd5d74e86e19805de89d5226f6367ee507483ebd
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/613976
Commit-Queue: Hyang-Ah Hana Kim <[email protected]>
kokoro-CI: kokoro <[email protected]>
Reviewed-by: Hongxiang Jiang <[email protected]>

Author: hyangah