changelog += WARN_NESTED_VAR fixes (#727, #731)

changelog.md

@@ -75,6 +75,10 @@
 
 - Recognize `strace` as a precommand
 
+- Fix an error message on stderr before every prompt when the `WARN_NESTED_VAR` zsh option is set:
+  `_zsh_highlight_main__precmd_hook:1: array parameter _zsh_highlight_main__command_type_cache set in enclosing scope in function _zsh_highlight_main__precmd_hook`
+  [#727, #731]
+
 # Changes in version 0.7.1
 
 - Remove out-of-date information from the 0.7.0 changelog.