Fix version of `lib.rs`
`0.17.1` -> `0.18.0`
//! ### Cargo.toml
//!
//! * To use `peroxide`, you should edit `Cargo.toml`
-//! * Current document version is corresponding to `0.17.1`
+//! * Current document version is corresponding to `0.18.0`
//!
//! 1. Default
//! ```toml
//! [dependencies]
-//! peroxide = "0.17"
+//! peroxide = "0.18"
//! ```
//! 2. OpenBLAS & SIMD
//! ```toml
//! [dependencies.peroxide]
-//! version = "0.17"
+//! version = "0.18"
//! default-features = false
//! features = ["O3"]
//! ```
//! 3. Plot
//! ```toml
//! [dependencies.peroxide]
-//! version = "0.17"
+//! version = "0.18"
//! default-features = false
//! features = ["plot"]
//! ```
//! 4. DataFrame
//! ```toml
//! [dependencies.peroxide]
-//! version = "0.17"
+//! version = "0.18"
//! default-features = false
//! features = ["dataframe"]
//! ```
-//! 4. Together
+//! 5. Together
//! ```toml
//! [dependencies.peroxide]
-//! version = "0.17"
+//! version = "0.18"
//! default-features = false
//! features = ["O3", "plot", "dataframe"]
//! ```
