Release 1.8.4

• Several garbage collector enhancements
• Fixed serious memory leak in the compiler
• Fixed read command logic in the LispKit REPL
• REPL now uses default colors and thus also works with dark mode.
• Made field access of records type safe.
• New libraries: (srfi 6), (srfi 54), (srfi 162)
• Extended library (lispkit dynamic) with assertion support: make-assertion-error, assertion, assert
• New sample code Polynomials.scm