Sensitive to case and doesn't ignore irrelevant backticks

[skaramicke]

These two SQL statements are equal, as far as tokenization can be expected to work.

Lowercase without backticks:

select 1 + 1 as two

Uppercase with backticks:

SELECT 1 + 1 as `two`

Sample output from phpunit run:

Summary of non-successful tests:

Database Migrator
 ✘ Executes migration to version 1 when version is 0
 ┐
 ├ Failed asserting that two SQL query sequences are equal (whitespace ignored).
 ├ Failed asserting that two arrays are equal. 
 ┊ ---·Expected
 ┊ +++·Actual
 ┊ @@ @@
 ┊ Array &0 (
 ┊ -····0·=>·'select·1·+·1·as·two'
 ┊ +····0·=>·'SELECT·1·+·1·as·`two`'
 ┊ )
 │
 ╵ /project/vendor/czukowski/phpunit-sql/classes/EqualsSQLQueriesConstraint.php:65
 ╵ /project/vendor/czukowski/phpunit-sql/classes/AssertTrait.php:51
 ╵ /project/tests/TestDatabaseMigrations.php:10
 ┴