fix(migration): address feedback from PR review

Author: idebenone

src/index.ts

@@ -27,7 +27,7 @@ export default class InlineCode implements InlineTool {
   /**
    * Tag representing the term
    */
-  private tag: string;
+  private tag: string = 'CODE';
   /**
    * CSS classes for the icon
    */
@@ -47,8 +47,6 @@ export default class InlineCode implements InlineTool {
 
     this.button = null;
 
-    this.tag = 'CODE';
-
     this.iconClasses = {
       base: this.api.styles.inlineToolButton,
       active: this.api.styles.inlineToolButtonActive,