v2.0

This new version of shlang contains many new features and breaking changes.

Such as:

• Lists [1,2,3]
• Fixed structs
• Improved error handling
• Closures var a = $(){...} var a = $() 10
• for loops for i in list{...}
• Reworked comments //hey /*hello*/
• Reworked binary operators true && false || 12
• Anonymous structs without the struct keyword var a = {a:10};
• Stricter implicit results
• ?? and ??= null coalescing operators
• Stricter void expressions
  etc..
  Docs are being updated to be more freindly to newcommers and to better explain new features