Fix COLLATE issue for BLOB

Invalid collate for blob lead to an error

Error 1253: COLLATION 'utf8mb4_unicode_ci' is not valid for CHARACTER SET 'binary'

It was fixed by removing default COLLATE for BLOB

Precise timestamp, proper default and exported keys

• precision for Timeable. It enables microseconds for timestamp, datetime and time
• migrations table has been updated to support microseconds
• default values for expressions can be used for Enum, JSON, Text and String column types. To make an expression, use curly braces, eg. (UUID())
• Empty string can be used for default in Enum, JSON, Text and String column types. Use <empty> or <nil> as default value
• Foreign and Key became exported, so they can be used with alterTableCommand

Fix documentation

Change DropTable to the DropTableIfExists in examples

Change fmt to log in README

Fixed typos

v1.1.2

Fix typos

Improve documentation

v1.1.1

Improve GoDoc

Extend table and schema commands

Add schema command:

• DropTableIfExists

Add helper functions to the table to add columns:

• BinaryID()
• Int()
• BigInt()
• Float()
• FixedFloat()
• Decimal()
• Varchar()
• Char()
• Text()
• Blob()
• JSON()
• Timestamp()
• Date()
• Time()
• Year()
• Binary
• Varbinary()

Initial deploy

Migration setup:

• Running migration
• Reverting migration
• Transactional migration

Schema commands:

• Create table
• Drop table
• Rename table
• Alter table