8ca2ecd52d
* Add support for exporting environment variables * Support multiple exports in one command Also improves the structure of the AST so the variable name and the assigned expression aren't free-floating * Allow for multiple declarations in local declarations as well Simplify the generated nodes. * Commit generated code * Consolidate declarations into a single declaration_command This also adds support for declare, typeset, and readonly * Rename environment_variable_assignment to variable_assignment
