Breaking change. Make all italic to italics.

src/file/paragraph/run/run.spec.ts

@@ -21,9 +21,9 @@ describe("Run", () => {
         });
     });
 
-    describe("#italic()", () => {
+    describe("#italics()", () => {
         it("it should add italics to the properties", () => {
-            run.italic();
+            run.italics();
             const newJson = Utility.jsonify(run);
             assert.equal(newJson.root[0].root[0].rootKey, "w:i");
             assert.equal(newJson.root[0].root[1].rootKey, "w:iCs");

src/file/paragraph/run/run.ts

@@ -39,7 +39,7 @@ export class Run extends XmlComponent {
         return this;
     }
 
-    public italic(): Run {
+    public italics(): Run {
         this.properties.push(new Italics());
         this.properties.push(new ItalicsComplexScript());
         return this;