Update module version information in usage doc to match devDependencies

docs/docs/usage.md

@@ -161,7 +161,7 @@ With the release of Sequelize`v1.6.0`, the library got indep
 
 
 ### MySQL
 ### MySQL
 
 
-In order to get Sequelize working nicely together with MySQL, you'll need to install`mysql@~2.0.0-alpha7`or higher. Once that's done you can use it like this:
+In order to get Sequelize working nicely together with MySQL, you'll need to install`mysql@~2.5.0`or higher. Once that's done you can use it like this:
     
     
 ```js
 ```js
 var sequelize = new Sequelize('database', 'username', 'password', {
 var sequelize = new Sequelize('database', 'username', 'password', {
@@ -178,7 +178,7 @@ for examples (currently only mysql and mariadb are supported).
 
 
 ### MariaDB
 ### MariaDB
 
 
-For MariaDB compatibility you have to install the package `mariasql@0.1.20`, or higher.
+For MariaDB compatibility you have to install the package `mariasql@~0.1.20`.
 The configuration needs to look like this:
 The configuration needs to look like this:
   
   
 ```js  
 ```js  
@@ -189,7 +189,7 @@ var sequelize = new Sequelize('database', 'username', 'password', {
 
 
 ### SQLite
 ### SQLite
 
 
-For SQLite compatibility you'll need`sqlite3@~2.1.5`. Configure Sequelize like this:
+For SQLite compatibility you'll need`sqlite3@~3.0.0`. Configure Sequelize like this:
 
 
 ```js    
 ```js    
 var sequelize = new Sequelize('database', 'username', 'password', {
 var sequelize = new Sequelize('database', 'username', 'password', {
@@ -204,7 +204,7 @@ var sequelize = new Sequelize('database', 'username', 'password', {
 
 
 ### PostgreSQL
 ### PostgreSQL
 
 
-The library for PostgreSQL is`pg@~2.0.0`. You'll just need to define the dialect:
+The library for PostgreSQL is`pg@~3.6.0` You'll just need to define the dialect:
  
  
 ```js   
 ```js   
 var sequelize = new Sequelize('database', 'username', 'password', {
 var sequelize = new Sequelize('database', 'username', 'password', {