0.3.0

• Lowercase "z" is now accepted as zero-timezone-offset indicator
• Space is no longer accepted as an escaped character
• Hex/Octal/Binary numbers with no digits surrounding _ is considered invalid
• Comments or whitespace at start of document no longer causes parsing failure
• TOML with invalid UTF-8 byte sequence will be rejected. Previously these have
  been decoded with the replacement character (U-FFFD).
• Local date with a trailing T such as 2023-04-16T is considered invalid.
• Day with value 00 is invalid.
• Allow defining super table after it has been implicitly defined. For example,
  one could define [a.b.c], then later [a].
• Using dotted keys to add up to a previously header-defined table is now
  invalid. For example, use [a.b.c] to create the table, and later have
  b.c = under [a].
• A standalone carriage return is no longer considered a valid newline
• Inline tables are now immutable
• Mutating array of tables that were implicitly created (e.g. a = [{}]) is now
  invalid
• Keys with spaces in between segments are now valid
• Multiline strings can now have 1 or two quotes as valid content
• Local date with a comment (1970-01-01 # some comment) is now accepted
• Control characters (except taps) in comments are now invalid
• Escaped CLRF character in multiline string is properly handled