* Support completions that require changing from dot to bracket access
* Use insertText and replacementSpan
* Rename includeBracketCompletions to includeInsertTextCompletions
* Don't add completions that start with space
* Allow quoted names in completions
* Don't allow string literal completions if not in an object literal; and use string literals for number keys
* Add TODO
* Completion for default export should be '.default'
* Don't include empty string in name table
* getSymbolsInScope() should return local symbols, not exported symbols
* Fix bug: getSymbolAtLocation should work for local symbol too