João v2.0.1

This update focuses on making João more optimized, while also squashing a bunch of bugs.

Optimizations 🏃‍♀️

• Fixed the Scope class being accidentally copied every time it was used for variable access, resulting in João now running more than twice as fast.
• Removed a few unnecessary string copies, resulting in an additional ~10% speedup.
• The Scopelet internal struct no longer has a superfluous string member. Resulted in a 1.4% speedup.

Features 🔋

• The /file methods are now better about reporting errors when opening, reading, and writing to files.
• /file.open()'s second argument, to determine whether the file (if existing) is blanked, now does not require the 2nd argument to be a Bool; it is cast into one implicitly.
• João no longer produces a weird temporary file when used in interactive mode.

Bugfixes 🧼

• Fixed member accesses returning a Value of Function type with a nullptr inside whenever a member access fails. João safely throws a BadMemberAccess runtime instead.
• Fixed minor memory leak associated with interactive mode.
• Fixed the typeof() function not giving reasonable results for Values of type Null or Function.
• Fixed parse failure when using the ../ scoping operator repetitively.