[Snyk] Security upgrade @slidev/cli from 0.46.3 to 0.49.12

[afroze9]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Regular Expression Denial of Service (ReDoS) SNYK-JS-CODEMIRROR-10494092	738

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🦉 Regular Expression Denial of Service (ReDoS)