feat(smartversion): add equality comparison methods for SmartVersion instances and version strings

ts/index.ts

@@ -54,6 +54,17 @@ export class SmartVersion {
     return plugins.semver.lt(this.versionString, versionStringArg);
   }
 
+  public equals(smartVersionArg: SmartVersion) {
+    return this.equalsString(smartVersionArg.versionString);
+  }
+
+  /**
+   * compares the version of this against a string for equality
+   */
+  public equalsString(versionStringArg: string) {
+    return plugins.semver.eq(this.versionString, versionStringArg);
+  }
+
   /**
    * tries to get the best match from a range of available versions
    */