update dependency versions.

pom.xml

@@ -46,7 +46,7 @@ It supports test-case and test-suite which are Selenium IDE's native format.</de
     <target.version>1.8</target.version>
     <skipTests>true</skipTests>
     <selenium.version>3.4.0</selenium.version>
-    <htmlunit-driver.version>2.26</htmlunit-driver.version>
+    <htmlunit.version>2.27</htmlunit.version>
     <httpclient.version>4.5.3</httpclient.version>
     <httpcore.version>4.4.6</httpcore.version>
     <slf4j.version>1.7.25</slf4j.version>
@@ -444,10 +444,25 @@ It supports test-case and test-suite which are Selenium IDE's native format.</de
           </exclusion>
         </exclusions>
       </dependency>
+      <dependency>
+	<groupId>net.sourceforge.htmlunit</groupId>
+	<artifactId>htmlunit</artifactId>
+	<version>${htmlunit.version}</version>
+      </dependency>
+      <dependency>
+	<groupId>net.sourceforge.htmlunit</groupId>
+	<artifactId>htmlunit-core-js</artifactId>
+	<version>${htmlunit.version}</version>
+      </dependency>
+      <dependency>
+	<groupId>net.sourceforge.htmlunit</groupId>
+	<artifactId>neko-htmlunit</artifactId>
+	<version>${htmlunit.version}</version>
+      </dependency>
       <dependency>
         <groupId>org.seleniumhq.selenium</groupId>
         <artifactId>htmlunit-driver</artifactId>
-        <version>${htmlunit-driver.version}</version>
+        <version>${htmlunit.version}</version>
         <exclusions>
           <exclusion>
             <groupId>commons-logging</groupId>
@@ -502,7 +517,7 @@ It supports test-case and test-suite which are Selenium IDE's native format.</de
     <dependency>
       <groupId>com.codeborne</groupId>
       <artifactId>phantomjsdriver</artifactId>
-      <version>1.4.2</version>
+      <version>1.4.3</version>
       <exclusions>
         <exclusion>
           <groupId>org.seleniumhq.selenium</groupId>