v1.8.4

• Drop ; after #pragma.

• Update CI setups.

• Fix repeated evaluations of &parse-at expression.

• Fix stray Python escape sequence.

• Fix skipping of literal fields with condition.

• Fix type of generated code for string::size.

  While we defined string's size operator to return an uint64 and documented that it returns the length in codepoints, not bytes, we still generated C++ code which worked on the underlying bytes (i.e., it directly invoked std::string::size instead of using hilti::rt::string::size).