Update to Lombok AST 0.2.1 for lint

Also enable null suggestions.

Change-Id: I68e7e2d661ef5419a5582d0181ded086dec124cb
diff --git a/.idea/inspectionProfiles/idea_default.xml b/.idea/inspectionProfiles/idea_default.xml
index e72b8da..877c305 100644
--- a/.idea/inspectionProfiles/idea_default.xml
+++ b/.idea/inspectionProfiles/idea_default.xml
@@ -50,7 +50,7 @@
     <inspection_tool class="ConstantConditionalExpressionJS" enabled="false" level="WARNING" enabled_by_default="false" />
     <inspection_tool class="ConstantConditions" enabled="true" level="WARNING" enabled_by_default="true">
       <scope name="runtime.classes" level="WARNING" enabled="false">
-        <option name="SUGGEST_NULLABLE_ANNOTATIONS" value="false" />
+        <option name="SUGGEST_NULLABLE_ANNOTATIONS" value="true" />
         <option name="DONT_REPORT_TRUE_ASSERT_STATEMENTS" value="false" />
       </scope>
       <option name="SUGGEST_NULLABLE_ANNOTATIONS" value="true" />
diff --git a/.idea/libraries/lombok_ast.xml b/.idea/libraries/lombok_ast.xml
index e6dd880..f3c7a72 100644
--- a/.idea/libraries/lombok_ast.xml
+++ b/.idea/libraries/lombok_ast.xml
@@ -1,11 +1,16 @@
 <component name="libraryTable">
   <library name="lombok-ast">
     <CLASSES>
-      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.jar!/" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/src.zip!/" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1-src.zip!/src/template" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1-src.zip!/src/ecjTransformer" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1-src.zip!/src/javacTransformer" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1-src.zip!/src/printer" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1-src.zip!/src/main" />
+      <root url="jar://$TOOLS_PREBUILTS$/common/lombok-ast/lombok-ast-0.2.1-src.zip!/build/lombok.ast_generatedSource" />
     </SOURCES>
   </library>
 </component>
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