Upgrade dependencies (#225)

pom.xml

@@ -109,7 +109,7 @@
     <dependency>
       <groupId>com.lihaoyi</groupId>
       <artifactId>requests_${scala.compat.version}</artifactId>
-      <version>0.7.1</version>
+      <version>0.8.0</version>
     </dependency>
 
     <dependency>
@@ -121,7 +121,7 @@
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
-      <version>2.9.0</version>
+      <version>2.10.1</version>
     </dependency>
 
     <dependency>
@@ -232,7 +232,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M7</version>
+        <version>3.0.0</version>
         <configuration>
           <skipTests>true</skipTests>
         </configuration>
@@ -241,7 +241,7 @@
       <plugin>
         <groupId>org.scalatest</groupId>
         <artifactId>scalatest-maven-plugin</artifactId>
-        <version>2.0.2</version>
+        <version>2.2.0</version>
         <configuration>
           <reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
           <junitxml>.</junitxml>
@@ -283,7 +283,7 @@
       <plugin>
         <groupId>net.alchim31.maven</groupId>
         <artifactId>scala-maven-plugin</artifactId>
-        <version>4.6.3</version>
+        <version>4.8.1</version>
         <executions>
           <execution>
             <id>attach-javadocs</id>