add Arcade isPaused boolean to ts definition
add Arcade isPaused boolean to ts definition

The game.physics.Arcade class is missing the 'isPaused' boolean value which is implemented in src/physics/arcade/World.js line 72 / https://github.com/photonstorm/phaser-ce/blob/v2.8.5/src/physics/arcade/World.js#L72
photonstorm/phaser-ce,MasahiroWard/MVPgamedev,MasahiroWard/MVPgamedev,yupaul/phaser-ce,natlot/phaser-ce,yupaul/phaser-ce,photonstorm/phaser-ce,natlot/phaser-ce,yupaul/phaser-ce,natlot/phaser-ce,photonstorm/phaser-ce,MasahiroWard/MVPgamedev,photonstorm/phaser-ce,MasahiroWard/MVPgamedev,natlot/phaser-ce,yupaul/phaser-ce