File name upgrades from Knex v0.95 and unique index in mysql compiler

[rachet-khanal]

There are changes in the recent upgrade of v0.95 which now changes the names of files such as dialects/mysql/schema/tablecompiler into dialects/mysql/schema/mysql-tablecompiler.js.

Also unique() function builds query statement with {indexname}(columns) which needs a function similar to index and dropIndex in TableCompiler something like below to remove indexing?

unique(columns, indexName) {
this.pushQuery(
alter table ${this.tableName()} add unique (${this.formatter.columnize( columns )})
);
}
;