feat: add HttpRequest tasks (#14)

* [CHANGE ME] Re-generated  to pick up changes in the API or client library generator.

* fix: allow proto interface changes

Author: yoshi-automation

proto-google-cloud-tasks-v2/clirr-ignored-differences.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- see http://www.mojohaus.org/clirr-maven-plugin/examples/ignored-differences.html -->
+<differences>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/tasks/v2/*OrBuilder</className>
+    <method>* get*(*)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/tasks/v2/*OrBuilder</className>
+    <method>boolean contains*(*)</method>
+  </difference>
+  <difference>
+    <differenceType>7012</differenceType>
+    <className>com/google/cloud/tasks/v2/*OrBuilder</className>
+    <method>boolean has*(*)</method>
+  </difference>
+</differences>