It somehow didn't work with the command `cmake -DCMAKE_BUILD_TYPE=Release`.

* First Implementation of GQL parser

* Address @sherman-the-tank 's comments

* Implement syntax of UPDATE/INSERT

In addition, added support for hexadecimal and octal numbers.

* Reserve space on the buffer in `toString`

* Fixes #14 Add more UT for FileBasedWAL

* [Feature] Added some concurrent utilities, GenericThreadPool, etc.

This reverts commit b22b49fbcb6645c085fb1ebf42962b9a37bd1711.