Update Readme, bump to 0.4.0

Author: driftluo

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "influx_db_client"
-version = "0.3.6"
+version = "0.4.0"
 authors = ["piaoliu <[email protected]>"]
 documentation = "https://docs.rs/influx_db_client/"
 repository = "https://github.com/driftluo/InfluxDBClient-rs"

README.md

@@ -19,23 +19,22 @@ This project has been able to run properly, PR is welcome.
 
 ```
 [dependencies]
-influx_db_client = "^0.3.6"
+influx_db_client = "^0.4.0"
 ```
 
 ### http
 
 ```Rust
-#[macro_use]
-extern crate influx_db_client;
-
-use influx_db_client::{Client, Point, Points, Value, Precision};
+use influx_db_client::{
+    Client, Point, Points, Value, Precision, point, points
+};
+use tokio;
 
 fn main() {
     // default with "http://127.0.0.1:8086", db with "test"
     let client = Client::default().set_authentication("root", "root");
 
-    let mut point = point!("test1");
-    point
+    let point = point!("test1")
         .add_field("foo", Value::String("bar".to_string()))
         .add_field("integer", Value::Integer(11))
         .add_field("float", Value::Float(22.3))
@@ -47,37 +46,34 @@ fn main() {
         .add_tag("float", Value::Float(12.6))
         .add_field("fd", Value::String("'3'".to_string()))
         .add_field("quto", Value::String("\\\"fda".to_string()))
-        .add_field("quto1", Value::String("\"fda".to_string()))
-        .to_owned();
+        .add_field("quto1", Value::String("\"fda".to_string()));
 
     let points = points!(point1, point);
 
-    // if Precision is None, the default is second
-    // Multiple write
-    let _ = client.write_points(points, Some(Precision::Seconds), None).unwrap();
+    tokio::runtime::Runtime::new().unwrap().block_on(async move {
+        // if Precision is None, the default is second
+        // Multiple write
+        client.write_points(points, Some(Precision::Seconds), None).await.unwrap();
 
-    // query, it's type is Option<Vec<Node>>
-    let res = client.query("select * from test1", None).unwrap();
-    println!("{:?}", res.unwrap()[0].series)
+        // query, it's type is Option<Vec<Node>>
+        let res = client.query("select * from test1", None).await.unwrap();
+        println!("{:?}", res.unwrap()[0].series)
+    });
 }
 ```
 
 ### udp
 
 ```Rust
-#[macro_use]
-extern crate influx_db_client;
-
-use influx_db_client::{UdpClient, Point, Value};
+use influx_db_client::{UdpClient, Point, Value, point};
 
 fn main() {
     let mut udp = UdpClient::new("127.0.0.1:8089");
     udp.add_host("127.0.0.1:8090");
 
-    let mut point = point!("test");
-    point.add_field("foo", Value::String(String::from("bar")));
+    let point = point!("test").add_field("foo", Value::String(String::from("bar")));
 
-    let _ = udp.write_point(point).unwrap();
+    udp.write_point(point).unwrap();
 }
 ```