Update MySQL compiler name file

[humatios]

The latest version of Knex (1.0.3) changes the file name knex/lib/dialects/mysql/query/compiler now the name is: knex/lib/dialects/mysql/query/mysql-querycompiler

This is breaking the code using last version of knex and last version of this package

Error: Cannot find module 'knex/lib/dialects/mysql/query/compiler'
Require stack:
/node_modules/knex-snowflake-dialect/src/query/QueryCompiler.ts:2:1)