Add optional semicolon at the end of statements and move loop parser from factor to expression (change precedence)

smnp/token/type.py

@@ -12,6 +12,7 @@ class TokenType(Enum):
     CLOSE_SQUARE = ']'
     OPEN_ANGLE = '<'
     CLOSE_ANGLE = '>'
+    SEMICOLON = ';'
     ASTERISK = '*'
     ASSIGN = '='
     ARROW = '->'