Also return 'text' parameter in send_keys

Fixes:

| Error while executing command: sendKeysToElement: Missing 'text' parameter at [...]

Specification details available at
https://w3c.github.io/webdriver/webdriver-spec.html#element-send-keys

Closes #319
Thanks: Gerhard Jungwirth <gjungwirth@sipwise.com>

lib/Selenium/Remote/WebElement.pm

@@ -172,7 +172,8 @@ sub send_keys {
     # standalone server.
     my $strings = join('', map { $_ .= "" } @strings);
     my $params = {
-        'value' => [ split('', $strings) ]
+        'value' => [ split('', $strings) ],
+        text => $strings,
     };
     return $self->_execute_command( $res, $params );
 }

t/mock-recordings/11-action-chains-mock.json

@@ -34,7 +34,7 @@
       "HTTP/1.1 200 OK\nCache-Control: no-cache\nCache-Control: no-cache\nConnection: close\nDate: Thu, 25 May 2017 00:45:46 GMT\nServer: Jetty(9.4.3.v20170317)\nContent-Length: 159\nContent-Type: application/json;charset=utf-8\nExpires: Thu, 01 Jan 1970 00:00:00 GMT\nExpires: Thu, 01 Jan 1970 00:00:00 GMT\nClient-Date: Thu, 25 May 2017 00:45:47 GMT\nClient-Peer: 127.0.0.1:4444\nClient-Response-Num: 1\n\n{\"state\":\"success\",\"sessionId\":\"55e79ca1-4499-42b7-a5ff-052d8319c31d\",\"hCode\":1926643558,\"value\":null,\"class\":\"org.openqa.selenium.remote.Response\",\"status\":0}\n",
       "HTTP/1.1 200 OK\nCache-Control: no-cache\nCache-Control: no-cache\nConnection: close\nDate: Thu, 25 May 2017 00:45:47 GMT\nServer: Jetty(9.4.3.v20170317)\nContent-Length: 159\nContent-Type: application/json;charset=utf-8\nExpires: Thu, 01 Jan 1970 00:00:00 GMT\nExpires: Thu, 01 Jan 1970 00:00:00 GMT\nClient-Date: Thu, 25 May 2017 00:45:47 GMT\nClient-Peer: 127.0.0.1:4444\nClient-Response-Num: 1\n\n{\"state\":\"success\",\"sessionId\":\"55e79ca1-4499-42b7-a5ff-052d8319c31d\",\"hCode\":1126613260,\"value\":null,\"class\":\"org.openqa.selenium.remote.Response\",\"status\":0}\n"
    ],
-   "POST session/55e79ca1-4499-42b7-a5ff-052d8319c31d/element/0/value {\"value\":[\"t\",\"e\",\"s\",\"t\"]}" : [
+   "POST session/55e79ca1-4499-42b7-a5ff-052d8319c31d/element/0/value {\"text\":\"test\",\"value\":[\"t\",\"e\",\"s\",\"t\"]}" : [
       "HTTP/1.1 200 OK\nCache-Control: no-cache\nCache-Control: no-cache\nConnection: close\nDate: Thu, 25 May 2017 00:45:46 GMT\nServer: Jetty(9.4.3.v20170317)\nContent-Length: 158\nContent-Type: application/json;charset=utf-8\nExpires: Thu, 01 Jan 1970 00:00:00 GMT\nExpires: Thu, 01 Jan 1970 00:00:00 GMT\nClient-Date: Thu, 25 May 2017 00:45:46 GMT\nClient-Peer: 127.0.0.1:4444\nClient-Response-Num: 1\n\n{\"state\":\"success\",\"sessionId\":\"55e79ca1-4499-42b7-a5ff-052d8319c31d\",\"hCode\":176264164,\"value\":null,\"class\":\"org.openqa.selenium.remote.Response\",\"status\":0}\n"
    ],
    "POST session/51340f61-2ea5-435c-b0b4-696a64b09ecb/url {\"url\":\"http://medialize.github.io/jQuery-contextMenu/demo.html\"}" : [