Add badges to readme

Cargo.toml

@@ -14,7 +14,6 @@ include = [
 ]
 
 [dependencies]
-serde_json = "1.0.79"
 clap =  { version = "3.1.8", features = ["derive"] }
 rnix = "0.10.1"
 owo-colors = "3.3.0"

README.md

@@ -1,4 +1,10 @@
-# Nix-Editor
+Nix-Editor
+===
+[![crates.io][crates badge]][crate]
+[![Coverage Status][coveralls badge]][coveralls]
+[![Built with Nix][builtwithnix badge]][builtwithnix]
+[![License: GPL v3][gplv3 badge]][gplv3]
+
 A command line utility for modifying NixOS configuration values.
 
 ## NixOS Installation
@@ -28,4 +34,12 @@ OPTIONS:
     -o, --output <OUTPUT>    Output file for modified config or read value
     -v, --val <VAL>          Value to write
     -V, --version            Print version information
-```
+```
+[coveralls badge]: https://img.shields.io/coveralls/github/vlinkz/nix-editor?style=flat-square
+[coveralls]: https://coveralls.io/github/vlinkz/nix-editor
+[crates badge]: https://img.shields.io/crates/v/nix-editor.svg?style=flat-square
+[crate]: https://crates.io/crates/nix-editor
+[builtwithnix badge]: https://img.shields.io/badge/Built%20With-Nix-41439A?style=flat-square&logo=nixos&logoColor=white
+[builtwithnix]: https://builtwithnix.org/
+[gplv3 badge]: https://img.shields.io/badge/License-GPLv3-blue.svg?style=flat-square
+[gplv3]: https://www.gnu.org/licenses/gpl-3.0

src/read.rs

@@ -1,8 +1,5 @@
 use crate::parse::{findattr, getcfgbase};
 use rnix::{SyntaxKind, SyntaxNode};
-use serde_json::{self, Value};
-use std::{process::Command};
-
 pub enum ReadError {
     ParseError,
     NoAttr,

src/tests/tests.rs

@@ -1,11 +1,9 @@
-use serde_json::de::Read;
-
 use crate::{
     read::{getarrvals, readvalue, ReadError, getwithvalue},
     write::{ addtoarr, deref, write, rmarr }, parse::{collectattrs, getcfgbase},
 };
 use core::panic;
-use std::{fs, io::Write, path::Path, collections::HashMap};
+use std::{fs, path::Path, collections::HashMap};
 
 #[test]
 fn read_val1() {