Use namespace import syntax to support newer bundlers

The old `import printj from 'printj'` syntax was causing an error in in a personal project where I was using Vite v4.3.9. Making this change to the import syntax and rebuilding this project solved the issue for me.

src/lib/string.ts

@@ -1,4 +1,4 @@
-import printj from 'printj'
+import * as printj from 'printj'
 import { Table } from '../Table'
 import { LuaError } from '../LuaError'
 import { tostring, posrelat, coerceArgToNumber, coerceArgToString, hasOwnProperty, LuaType } from '../utils'