Update appveyor.yml

Author: javadev

appveyor.yml

@@ -2,18 +2,18 @@ version: '{build}'
 skip_tags: true
 clone_depth: 30
 environment:
-  JAVA_HOME: C:\Program Files\Java\jdk1.7.0
+  JAVA_HOME: C:\Program Files\Java\jdk1.8.0
 install:
   - ps: |
       Add-Type -AssemblyName System.IO.Compression.FileSystem
-      if (!(Test-Path -Path "C:\maven\apache-maven-3.3.9" )) {
+      if (!(Test-Path -Path "C:\maven\apache-maven-3.5.4" )) {
         (new-object System.Net.WebClient).DownloadFile(
-          'http://www.us.apache.org/dist/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.zip',
+          'http://www.us.apache.org/dist/maven/maven-3/3.5.4/binaries/apache-maven-3.5.4-bin.zip',
           'C:\maven-bin.zip'
         )
         [System.IO.Compression.ZipFile]::ExtractToDirectory("C:\maven-bin.zip", "C:\maven")
       }
-  - cmd: SET PATH=C:\maven\apache-maven-3.3.9\bin;%JAVA_HOME%\bin;%PATH%
+  - cmd: SET PATH=C:\maven\apache-maven-3.5.4\bin;%JAVA_HOME%\bin;%PATH%
   - cmd: SET MAVEN_OPTS=-Dhttps.protocols=TLSv1.2
 build_script:
   - mvn clean install -B -DskipTests
@@ -23,4 +23,4 @@ test_script:
   - mvn -f string-plugin/pom.xml clean package jacoco:report
   - mvn -f examples/pom.xml clean package
 cache:
-  - C:\maven\apache-maven-3.3.9
+  - C:\maven\apache-maven-3.5.4