Support java version 1.8

Author: olimpias

api/pom.xml

@@ -67,7 +67,7 @@
         <profile>
             <id>disable-doclint</id>
             <activation>
-                <jdk>[11,)</jdk>
+                <jdk>[1.8,11,)</jdk>
             </activation>
             <properties>
                 <doclint>none</doclint>
@@ -149,6 +149,9 @@
                         </goals>
                     </execution>
                 </executions>
+                <configuration>
+                    <doclint>none</doclint>
+                </configuration>
                 <dependencies>
                     <!-- https://issues.apache.org/jira/browse/MJAVADOC-517 -->
                     <dependency>
@@ -177,8 +180,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.7.0</version>
                 <configuration>
-                    <source>11</source>
-                    <target>11</target>
+                    <source>1.8</source>
+                    <target>1.8</target>
                 </configuration>
             </plugin>
             <plugin>

api/src/main/java/com/messagebird/objects/PurchasedNumbersFilter.java

@@ -106,16 +106,14 @@ public void setType(PhoneNumberType type) {
     public HashMap<String, Object> toHashMap() throws GeneralException {
         final HashMap<String, Object> map = new HashMap<String, Object>();
         for (Field f: getClass().getDeclaredFields()) {
-            if (f.canAccess(this)) {
-                try {
-                    Object value = f.get(this);
-                    String key = f.getName();
-                    if (value != null) {
-                        map.put(key, value);
-                    }
-                } catch (IllegalAccessException exception) {
-                    throw new GeneralException("Error converting to HashMap.");
+            try {
+                Object value = f.get(this);
+                String key = f.getName();
+                if (value != null) {
+                    map.put(key, value);
                 }
+            } catch (IllegalAccessException exception) {
+                throw new GeneralException("Error converting to HashMap.");
             }
         }
         return map;