support for NO_COLOR: https://no-color.org/ and also bumped version number to 0.6.2

Author: Frederik Delaere

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "rsmodules"
-version = "0.6.1"
+version = "0.6.2"
 authors = ["Frederik Delaere <frederik.delaere@ugent.be>"]
 
 [dependencies]

Cargo.toml

@@ -500,7 +500,7 @@ pub fn setenv(var: &str, val: &str, shell: &str) -> String {
 }
 
 fn bold<'a>(shell: &str, msg: &'a str) -> ansi_term::ANSIGenericString<'a, str> {
-    if shell == "noshell" || shell == "perl" || shell == "python" || env::var("TERM") == Ok(String::from("")) {
+    if shell == "noshell" || shell == "perl" || shell == "python" || env::var("TERM") == Ok(String::from("")) || env::var("NO_COLOR").is_ok() {
         return Style::new().paint(msg);
     }