Fix Maven Wrapper EOL issues (#23)

* Upgrade Maven Wrapper to v3.3.2

.gitattributes

@@ -0,0 +1,4 @@
+* text=auto
+/.mvn/wrapper/maven-wrapper.properties text
+/mvnw text eol=lf
+/mvnw.cmd text eol=crlf

.mvn/wrapper/maven-wrapper.properties

@@ -6,13 +6,15 @@
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
 #
-#   https://www.apache.org/licenses/LICENSE-2.0
+#   http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+wrapperVersion=3.3.2
+distributionType=only-script
 distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.6/apache-maven-3.8.6-bin.zip
-wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.1/maven-wrapper-3.1.1.jar
+distributionSha256Sum=ccf20a80e75a17ffc34d47c5c95c98c39d426ca17d670f09cd91e877072a9309