Bump com.arpnetworking.build:arpnetworking-parent-pom from 3.3.4 to 3.3.6 (#451)

* Bump com.arpnetworking.build:arpnetworking-parent-pom

Bumps [com.arpnetworking.build:arpnetworking-parent-pom](https://github.com/arpnetworking/arpnetworking-parent-pom) from 3.3.4 to 3.3.6.
- [Release notes](https://github.com/arpnetworking/arpnetworking-parent-pom/releases)
- [Commits](ArpNetworking/arpnetworking-parent-pom@arpnetworking-parent-pom-3.3.4...arpnetworking-parent-pom-3.3.6)

---
updated-dependencies:
- dependency-name: com.arpnetworking.build:arpnetworking-parent-pom
  dependency-version: 3.3.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

* add some comments

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Brandon Arp <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.arpnetworking.build</groupId>
     <artifactId>arpnetworking-parent-pom</artifactId>
-    <version>3.3.4</version>
+    <version>3.3.6</version>
     <relativePath />
   </parent>
 

src/main/java/com/arpnetworking/tsdcore/model/Unit.java

@@ -170,8 +170,11 @@ public double convert(final double sourceValue, final Unit sourceUnit) {
     };
 
     /* package private */enum Type {
+        /** Time duration. */
         TIME,
+        /** Quantity of data. */
         DATA_SIZE,
+        /** Temperature. */
         TEMPERATURE
     }