Fix small typo (previus to previous)
Fix small typo (previus to previous)

jimmywarting/Dexie.js,jimmywarting/Dexie.js,jimmywarting/Dexie.js,jimmywarting/Dexie.js,dfahlander/Dexie.js,dfahlander/Dexie.js,dfahlander/Dexie.js,dfahlander/Dexie.js