Mark parser tasks as completed in roadmap

Author: michaelmior

ROADMAP.md

@@ -47,8 +47,8 @@ This stage will implement the compaction algorithm for the LSM tree.
 This stage will implement the query language of ArgusDB.
 
 - [x] Refine the specification of the query language in specs/query-language.md
-- [] Implement a grammar for parsing the query language
-- [] Create query plans with the internal API from the parsed SQL
+- [x] Implement a grammar for parsing the query language
+- [x] Create query plans with the internal API from the parsed SQL
 
 # Stage 8 - Server protocol