Various follow-ups to recent pushes

- Update CHANGELOG
- Update `.gitignore` for the build directory of the benchmark crate
- Remove src/lib from the recently added benchmark crate per
  https://github.com/andygrove/sqlparser-rs/pull/190#pullrequestreview-425835379

Author: nickolay

.gitignore

@@ -1,6 +1,7 @@
 # Generated by Cargo
 # will have compiled files and executables
 /target/
+/sqlparser_bench/target/
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
 # More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock

CHANGELOG.md

@@ -12,6 +12,8 @@ Check https://github.com/andygrove/sqlparser-rs/commits/master for undocumented
 - **`Parser::parse_sql` now accepts a `&str` instead of `String` (#182)** - thanks @Dandandan!
 - Change `Ident` (previously a simple `String`) to store the parsed (unquoted) `value` of the identifier and the `quote_style` separately (#143) - thanks @apparebit!
 - Support Snowflake's `FROM (table_name)` (#155) - thanks @eyalleshem!
+- Add line and column number to TokenizerError (#194) - thanks @Dandandan!
+- Make the units keyword following `INTERVAL '...'` optional (#184) - thanks @maxcountryman!
 
 ### Added
 - Support MSSQL `TOP (<N>) [ PERCENT ] [ WITH TIES ]` (#150) - thanks @alexkyllo!