Update Client and date. (#2318)

clients/horizonclient/CHANGELOG.md

@@ -5,7 +5,7 @@ file.  This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
-## [v2.1.0](https://github.com/stellar/go/releases/tag/horizonclient-v2.1.0) - 2020-02-21
+## [v2.1.0](https://github.com/stellar/go/releases/tag/horizonclient-v2.1.0) - 2020-02-24
 
 ### Add
 

clients/horizonclient/main_test.go

@@ -941,6 +941,16 @@ func TestFetchTimebounds(t *testing.T) {
 	assert.Equal(t, st.MaxTime, int64(200))
 }
 
+func TestVersion(t *testing.T) {
+	hmock := httptest.NewClient()
+	client := &Client{
+		HorizonURL: "https://localhost/",
+		HTTP:       hmock,
+	}
+
+	assert.Equal(t, "2.1.0", client.Version())
+}
+
 var accountsResponse = `{
   "_links": {
     "self": {

clients/horizonclient/version.go

@@ -2,4 +2,4 @@ package horizonclient
 
 // version is the current version of the horizonclient.
 // This is updated for every release.
-const version = "1.4"
+const version = "2.1.0"