Add Mnemonic::language and make language_of public

[stevenroose]

Also bumps the version to v1.0.1

[stevenroose]

Since a Mnemonic object only exists after parsing and validating, the only possible error from Mnemonic::language is Error::AmbiguousLanguages, we could actually do this:

diff --git a/src/lib.rs b/src/lib.rs
index 0beb726..c1eb750 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -362,8 +362,12 @@ impl Mnemonic {
        /// word lists. In the extremely unlikely case that a word list can be
        /// interpreted in multiple languages, an [Error::AmbiguousLanguages] is
        /// returned, containing the possible languages.
-       pub fn language(&self) -> Result<Language, Error> {
-               Mnemonic::language_of_iter(self.word_iter())
+       pub fn language(&self) -> Result<Language, AmbiguousLanguages> {
+               match Mnemonic::language_of_iter(self.word_iter()) {
+                       Ok(lang) => Ok(lang),
+                       Err(Error::AmbiguousLanguages(ambi)) => Err(ambi),
+                       Err(_) => unreachable!("the mnemonic is already validated"),
+               }
        }
 
        /// Parse a mnemonic in normalized UTF8 in the given language.

[stevenroose]

Superceded by #11.