add currency example and update version and relase notes

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "yahoo_finance_api"
-version = "2.0.1"
+version = "2.1.0"
 authors = ["Mark Beinker <[email protected]>", "Claus Matzinger <[email protected]>"]
 edition = "2018"
 description = "A rust adapter for the yahoo! finance API to fetch histories of market data quotes."

ReleaseNotes.md

@@ -1,3 +1,9 @@
+## Release 2.1.0
++ enable to retreive asset metadata
++ enable to fetch capital gains available on Mutual Funds
++ fix: support quote where firstTradeDate equals null
++ fx rate example added
+
 ## Release 2.0.1
 re-export the time crate
 
@@ -52,4 +58,4 @@ in separate files.
 **Note**: Yahoo-Error type has changed. `FetchFailed` has now a string as argument instead of the status code passed over by `reqwest` to decouple the interface from `reqwest`. The former error code `InvalidStatusCode` has been renamed to `InvalidJson`, which a more proper name since this error is returned if the response could not be read as JSON. 
 
 # Release 1.0.0
-The library is working stable with and without blocking feature enabled.
+The library is working stable with and without blocking feature enabled.

examples/get_fxrates.rs

@@ -0,0 +1,24 @@
+#[cfg(not(feature = "blocking"))]
+use tokio_test;
+use yahoo_finance_api as yahoo;
+
+#[cfg(not(feature = "blocking"))]
+fn get_history() -> Result<yahoo::YResponse, yahoo::YahooError> {
+    let provider = yahoo::YahooConnector::new();
+    let start = time::OffsetDateTime::UNIX_EPOCH;
+    let end= time::OffsetDateTime::now_utc();
+    tokio_test::block_on(provider.get_quote_history("EUR=x", start, end))
+}
+
+#[cfg(feature = "blocking")]
+fn get_history() -> Result<yahoo::YResponse, yahoo::YahooError> {
+    let provider = yahoo::YahooConnector::new();
+    let start = time::OffsetDateTime::UNIX_EPOCH;
+    let end= time::OffsetDateTime::now_utc();
+    provider.get_quote_history("EUR=x", start, end)
+}
+
+fn main() {
+    let quote_history = get_history().unwrap();
+    println!("Quote history of USD/EUR FX rate:\n{:#?}", quote_history);
+}