fix: disable regexp backtracking (#160) · moxystudio/node-cross-spawn@ba5aaef

Original file line number	Diff line number	Diff line change
`@@ -15,15 +15,17 @@ function escapeArgument(arg, doubleEscapeMetaChars) {`
`15`	`15`	arg = `${arg}`;
`16`	`16`
`17`	`17`	`// Algorithm below is based on https://qntm.org/cmd`
	`18`	`+// It's slightly altered to disable JS backtracking to avoid hanging on specially crafted input`
	`19`	`+// Please see https://github.com/moxystudio/node-cross-spawn/pull/160 for more information`
`18`	`20`
`19`	`21`	`// Sequence of backslashes followed by a double quote:`
`20`	`22`	`// double up all the backslashes and escape the double quote`
`21`		`-arg = arg.replace(/(\\*)"/g, '$1$1\\"');`
	`23`	`+arg = arg.replace(/(?=(\\+?)?)\1"/g, '$1$1\\"');`
`22`	`24`
`23`	`25`	`// Sequence of backslashes followed by the end of the string`
`24`	`26`	`// (which will become a double quote later):`
`25`	`27`	`// double up all the backslashes`
`26`		`-arg = arg.replace(/(\\*)$/, '$1$1');`
	`28`	`+arg = arg.replace(/(?=(\\+?)?)\1$/, '$1$1');`
`27`	`29`
`28`	`30`	`// All other backslashes occur literally`
`29`	`31`