fix(d.ts): fix the compile error of option-t.d.ts

CHANGELOG.md

@@ -2,6 +2,13 @@
 
 ## x.y.z
 
+## 0.16.3
+
+### Bug fix
+
+- Fix the compile error of `option-t.d.ts`. ([PR106](https://github.com/saneyuki/option-t.js/pull/106))
+  - This catches up [pr105](https://github.com/saneyuki/option-t.js/pull/105)
+
 ## 0.16.2
 
 ### Bug fix

option-t.d.ts

@@ -34,12 +34,12 @@ declare module 'option-t' {
         /**
          *  Return whether the self is `Some<T>` or not.
          */
-        isSome: this is Some<T>;
+        isSome: boolean;
 
         /**
          *  Return whether the self is `None` or not.
          */
-        isNone: this is None<T>;
+        isNone: boolean;
 
         /**
          *  Return the inner `T` of a `Some<T>`.
@@ -189,8 +189,8 @@ declare module 'option-t' {
 
     class Some<T> extends OptionBase implements OptionMethods<T> {
         constructor(val: T);
-        isSome: this is Some<T>;
-        isNone: this is None<T>;
+        isSome: boolean;
+        isNone: boolean;
         unwrap(): T;
         unwrapOr(def: T): T;
         unwrapOrElse(fn: () => T): T;
@@ -209,8 +209,8 @@ declare module 'option-t' {
 
     class None<T> extends OptionBase implements OptionMethods<T> {
         constructor();
-        isSome: this is Some<T>;
-        isNone: this is None<T>;
+        isSome: boolean;
+        isNone: boolean;
         unwrap(): T;
         unwrapOr(def: T): T;
         unwrapOrElse(fn: () => T): T;