typo fixes in comments and test messages [skip ci]

src/main/java/de/stklcode/pubtrans/ura/UraClient.java

@@ -367,7 +367,7 @@ public class UraClient implements Serializable {
      *
      * @param url The URL.
      * @return Input Stream of results.
-     * @throws IOException Error opening conneciton or reading data.
+     * @throws IOException Error opening connection or reading data.
      */
     private InputStream request(String url) throws IOException {
         return new URL(url).openStream();

src/main/java/de/stklcode/pubtrans/ura/model/Trip.java

@@ -145,7 +145,7 @@ public final class Trip implements Model {
     }
 
     /**
-     * Construct Stop object from raw list of attributes parsed from JSON with explicitly specified version.
+     * Construct Trip object from raw list of attributes parsed from JSON with explicitly specified version.
      *
      * @param raw     List of attributes from JSON line
      * @param version API version

src/main/java/de/stklcode/pubtrans/ura/reader/AsyncUraTripReader.java

@@ -70,7 +70,7 @@ public class AsyncUraTripReader implements AutoCloseable {
     }
 
     public void open() {
-        // Throw exeption, if future is already present.
+        // Throw exception, if future is already present.
         if (future != null) {
             throw new IllegalStateException("Reader already opened");
         }
@@ -113,7 +113,7 @@ public class AsyncUraTripReader implements AutoCloseable {
 
     /**
      * Close the reader.
-     * This is done by signaliung cancel to the asyncronous task. If the task is not completed
+     * This is done by signaling cancel to the asynchronous task. If the task is not completed
      * within 1 second however it is cancelled hard.
      */
     @Override