flutter release update code example

Example 1: update flutter version

I want to upgrade most latest version. So I used below commands:

flutter channel dev

Flutter has 4 project branches / channels ie stable, master, dev, beta. First 
when we install it. flutter install stable channel. If you want to switch :

flutter channel chanel_name

Then donwload that :

flutter upgrade

Example 2: flutter release

keytool -genkey -v -keystore c:\Users\USER_NAME\key.jks -storetype JKS -keyalg RSA -keysize 2048 -validity 10000 -alias key