Use already existing method to get all Timezones from chrono_tz.

This means we can use the released version of chrono_tz.

Cargo.toml

@@ -13,7 +13,8 @@ categories = ["command-line-utilities"]
 [dependencies]
 clap = { version = "~3.0.14", features = ["cargo", "derive"] }
 chrono = "0.4.19"
-chrono-tz = { git = "https://github.com/siedentop/chrono-tz", rev = "6bf301cf27efaa5e65d33d29c6de8180793a0bed" }
+# chrono-tz = { git = "https://github.com/siedentop/chrono-tz", rev = "6bf301cf27efaa5e65d33d29c6de8180793a0bed" }
+chrono-tz = "0.6.1"
 lazy_static = "1.4.0"
 regex = "1.5.4"
 auto_correct_n_suggest = "1.0.0"

src/timezones.rs

@@ -12,18 +12,14 @@ pub fn parse_timezone(time_zone_str: &String) -> Result<Tz, RizzyError> {
 
 pub fn guess_timezone(time_zone: String) -> Vec<String> {
     let mut dictionary = Dictionary::new();
-    for tz in build_timezone_list() {
+    for tz in chrono_tz::TZ_VARIANTS.iter().map(|x| x.to_string()) {
         dictionary.insert(tz);
     }
 
     let suggestions = dictionary.auto_suggest_alternative_words(time_zone);
     suggestions.unwrap_or_default()
 }
 
-fn build_timezone_list() -> Vec<String> {
-    chrono_tz::TIMEZONES.keys().map(|x| x.to_string()).collect()
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;