feat: update readme

README.md

@@ -1,22 +1,22 @@
 # go-btfs
 
-## What is BTFS 2.0?
+## What is BTFS 3.0?
 
 BitTorrent File System (BTFS) is a next-generation file sharing protocol in the BitTorrent ecosystem. Current mainstream public blockchains mostly focus on computational tasks but lack cost-effective, scalable, and high-performing file storage and sharing solutions.
 
 These are exactly what BTFS aims to clear up. Besides, underpinned by BTTC, BTFS enables cross-chain connectivity and multi-channel payments, making itself a more convenient choice. The intgration of BTFS, BitTorrent, and the BTTC network will boost DApp developers' efficiency in serving a wider market.
 
-* The [documentation](https://docs.btfs.io/) walks developers through BTFS 2.0 setup, usage, and API references.
+* The [documentation](https://docs.btfs.io/) walks developers through BTFS 3.0 setup, usage, and API references.
 * Please join the BTFS community at [discord](https://discord.com/invite/tJ4fz6C6rw).
 
-## BTFS 2.0 Architecture Diagram
+## BTFS 3.0 Architecture Diagram
 
 ![Architecture Diagram](https://files.readme.io/a21e9fb--min.png)
 
 ## Table of Contents
 - [go-btfs](#go-btfs)
-  - [What is BTFS 2.0?](#what-is-btfs-20)
-  - [BTFS 2.0 Architecture Diagram](#btfs-20-architecture-diagram)
+  - [What is BTFS 3.0?](#what-is-btfs-30)
+  - [BTFS 3.0 Architecture Diagram](#btfs-30-architecture-diagram)
   - [Table of Contents](#table-of-contents)
   - [Faucet](#faucet)
   - [Install BTFS](#install-btfs)
@@ -39,7 +39,7 @@ These are exactly what BTFS aims to clear up. Besides, underpinned by BTTC, BTFS
 
 ## Faucet
 
-In order to ensure the normal use of btfs 2.0 testnet, you need to apply for BTT at BTTC testnet, which is obtained [**here**](https://testfaucet.bt.io/#/).
+In order to ensure the normal use of btfs 3.0 testnet, you need to apply for BTT at BTTC testnet, which is obtained [**here**](https://testfaucet.bt.io/#/).
 
 ## Install BTFS
 
@@ -82,7 +82,7 @@ Specify the chain for btfs to run by `--chain-id`, the chainid of the test netwo
 ```
 $ btfs daemon --chain-id 1029
 Initializing daemon...
-go-btfs version: 2.0
+go-btfs version: 3.0
 Repo version: 10
 System version: amd64/darwin
 Golang version: go1.16.5