Prepare for release version 0.2.0.

Author: morazow

doc/changes/changes_0.2.0.md

@@ -1,4 +1,4 @@
-# Import Export UDF Common Scala 0.2.0, released 2020-10-DD
+# Import Export UDF Common Scala 0.2.0, released 2020-10-30
 
 ## Features
 

src/main/scala/com/exasol/avro/AvroConverter.scala

@@ -176,10 +176,13 @@ final class AvroConverter {
       )
   }
 
+  // Avro Map key is either Utf8 or Java String type, both can be
+  // converted to string.
+  @SuppressWarnings(Array("org.wartremover.warts.ToString"))
   private[this] def getMapValue(map: Any, field: Schema): JMap[String, Any] = {
     val result = new java.util.HashMap[String, Any]()
-    map.asInstanceOf[JMap[String, _]].forEach { (key, value) =>
-      val _ = result.put(key, getAvroValue(value, field.getValueType()))
+    map.asInstanceOf[JMap[_ <: java.lang.CharSequence, _]].forEach { (key, value) =>
+      val _ = result.put(key.toString(), getAvroValue(value, field.getValueType()))
     }
     result
   }

src/test/scala/com/exasol/avro/AvroComplexTypesTest.scala

@@ -47,7 +47,7 @@ class AvroComplexTypesTest extends AnyFunSuite {
         s"""|{
             |  "type": "record",
             |  "namespace": "com.exasol.avro.Types",
-            |  "name": "MapRecord",
+            |  "name": "RecordRecord",
             |  "fields": [
             |     {"name": "id", "type":"int"},
             |     $avroRecordType

src/test/scala/com/exasol/avro/AvroLogicalTypesTest.scala

@@ -87,7 +87,7 @@ class AvroLogicalTypesTest extends AnyFunSuite {
     "-2.31" -> "-2.31"
   )
 
-  test("parse avro bytes with decimal as big decimal type") {
+  test("parse avro bytes with decimal as Java BigDecimal type") {
     val schema = getLogicalSchema(
       s"""|{
           |   "type":"bytes",
@@ -107,7 +107,7 @@ class AvroLogicalTypesTest extends AnyFunSuite {
     }
   }
 
-  test("parse avro fixed with decimal as big decimal type") {
+  test("parse avro fixed with decimal as Java BigDecimal type") {
     val schema = getLogicalSchema(
       s"""|{
           |   "name":"fixed",