Fix runtime files location in package.json

[MaxDesiatov]

Resolves #79.

This requires tagging a new release and republishing on NPM to fully fix the issue.

[github-actions]

Time Change: +377ms (2%)

Total Time: 13,356.75ms

ℹ️ View Unchanged

Test name	Duration	Change
Serialization/Write JavaScript number directly	186.25ms	+5.5ms (2%)
Serialization/Write JavaScript string directly	181ms	-1.75ms (0%)
Serialization/Swift Int to JavaScript	4,843.25ms	+110ms (2%)
Serialization/Swift String to JavaScript	4,960ms	+118.25ms (2%)
Object heap/Increment and decrement RC	3,186.25ms	+145ms (4%)

_{performance-action}

[j-f1]

Yikes, thanks for fixing this!