resolve svelte from application entrypoint - fixes sveltejs#109

Author: rixo

lib/resolve-svelte.js

@@ -1,10 +1,10 @@
-const { version } = require('svelte/package.json');
+const { version } = require.main.require('svelte/package.json');
 
 const major_version = +version[0];
 
 const { compile, preprocess } = major_version >= 3
-	? require('svelte/compiler')
-	: require('svelte');
+	? require.main.require('svelte/compiler')
+	: require.main.require('svelte');
 
 module.exports = {
 	major_version,