minor: update README examples to import 1.0.0 version of driver (#201)

Author: yutiansut

README.md

@@ -35,7 +35,7 @@ This repository contains the officially supported MongoDB Rust driver, a client
 The driver is available on [crates.io](https://crates.io/crates/mongodb). To use the driver in your application, simply add it to your project's `Cargo.toml`.
 ```toml
 [dependencies]
-mongodb = "0.11.0"
+mongodb = "1.0.0"
 ```
 
 #### Configuring the async runtime
@@ -44,7 +44,7 @@ The driver supports both of the most popular async runtime crates, namely [`toki
 For example, to instruct the driver to work with [`async-std`](https://crates.io/crates/async-std), add the following to your `Cargo.toml`:
 ```toml
 [dependencies.mongodb]
-version = "0.11.0"
+version = "1.0.0"
 default-features = false
 features = ["async-std-runtime"]
 ```
@@ -53,7 +53,7 @@ features = ["async-std-runtime"]
 The driver also provides a blocking sync API. To enable this, add the `"sync"` feature to your `Cargo.toml`:
 ```toml
 [dependencies.mongodb]
-version = "0.11.0"
+version = "1.0.0"
 default-features = false
 features = ["sync"]
 ```