The Clickhouse JDBC driver doesn't report driver version

Connected to Clickhouse with this JDBC driver:
```
<dependency>
   <groupId>com.clickhouse</groupId>
   <artifactId>clickhouse-jdbc</artifactId>
   <version>0.8.2</version>
   <type></type>
</dependency>
```
Calling `DatabaseMetaData.getDriverVersion()` returns **unknown**.
**Expected:** It should return the actual version which in this case is **0.8.2**. 

