feat!: Account features

- Bump version to 0.2.0
- Added trait SquadObject
- Implemented SquadObject for Quest and Account
- Implemented Config::load_accounts
- Removed src/quest/error.rs
- Added account tests in tests/main.rs

BREAKING CHANGE: Quest::{load,delete,save} are now provided by
SquadObject trait

tests/main.rs

@@ -1,4 +1,4 @@
-use squad_quest::{config::Config, quest::Quest};
+use squad_quest::{account::Account, config::Config, quest::Quest};
 
 static CONFIG_PATH: &str = "./tests/main/config.toml";
 
@@ -43,3 +43,41 @@ fn quest_one() {
 
     assert_eq!(*quest, expected);
 }
+
+#[test]
+fn load_accounts() {
+    let config = Config::load(CONFIG_PATH.into());
+    let accounts = config.load_accounts();
+
+    assert_eq!(accounts.len(), 2);
+}
+
+#[test]
+fn empty_account_is_default() {
+    let config = Config::load(CONFIG_PATH.into());
+    let accounts = config.load_accounts();
+
+    let default = Account::default();
+
+    let account = accounts.iter().find(|a| a.id == default.id).unwrap();
+
+    assert_eq!(*account, default);
+}
+
+#[test]
+fn account_test() {
+    let config = Config::load(CONFIG_PATH.into());
+
+    let expected = Account {
+        id: "test".to_string(),
+        balance: 150,
+        location: 0,
+        quests_completed: vec![0],
+        rooms_unlocked: Vec::new()
+    };
+
+    let accounts = config.load_accounts();
+    let account = accounts.iter().find(|a| a.id == expected.id).unwrap();
+
+    assert_eq!(*account, expected);
+}