Update appveyor.yml

Update location of Maven binary

Author: tonyroberts

appveyor.yml

@@ -5,12 +5,12 @@ install:
       Add-Type -AssemblyName System.IO.Compression.FileSystem
       if (!(Test-Path -Path "C:\maven" )) {
         (new-object System.Net.WebClient).DownloadFile(
-          'http://www.us.apache.org/dist/maven/maven-3/3.5.3/binaries/apache-maven-3.5.3-bin.zip',
+          'http://www.us.apache.org/dist/maven/maven-3/3.6.1/binaries/apache-maven-3.6.1-bin.zip',
           'C:\maven-bin.zip'
         )
         [System.IO.Compression.ZipFile]::ExtractToDirectory("C:\maven-bin.zip", "C:\maven")
       }
-  - cmd: SET PATH=C:\maven\apache-maven-3.2.5\bin;%JAVA_HOME%\bin;%PATH%
+  - cmd: SET PATH=C:\maven\apache-maven-3.6.1\bin;%JAVA_HOME%\bin;%PATH%
   - cmd: SET MAVEN_OPTS=-XX:MaxPermSize=2g -Xmx4g
   - cmd: SET JAVA_OPTS=-XX:MaxPermSize=2g -Xmx4g
 build_script: