feat: Make context menu reactive for being enabled

Also: add some missing unit-tests, dammit. There's more, I'm afraid :(

Signed-off-by: Iku-turso <mikko.aspiala@gmail.com>

packages/injectable/core/index.test-d.ts

@@ -1,29 +1,28 @@
-import { expectError, expectAssignable, expectNotType, expectType } from 'tsd';
+import { expectAssignable, expectError, expectNotType, expectType } from 'tsd';
 
 import {
   createContainer,
+  createInjectionTargetDecorator,
+  createInstantiationTargetDecorator,
   DiContainer,
   DiContainerForInjection,
   getInjectable,
+  getInjectableBunch,
   getInjectionToken,
-  instantiationDecoratorToken,
-  createInstantiationTargetDecorator,
-  lifecycleEnum,
-  Instantiate,
+  getKeyedSingletonCompositeKey,
+  getSpecificInjectionToken,
   Injectable,
+  InjectableBunch,
   injectionDecoratorToken,
-  Inject,
-  createInjectionTargetDecorator,
-  SpecificInject,
   InjectionToken,
+  Instantiate,
+  instantiationDecoratorToken,
   isInjectable,
-  isInjectionToken,
-  getInjectableBunch,
-  getKeyedSingletonCompositeKey,
   isInjectableBunch,
-  InjectableBunch,
+  isInjectionToken,
+  lifecycleEnum,
+  SpecificInject,
   SpecificInjectionToken,
-  getSpecificInjectionToken,
 } from '.';
 
 const di = createContainer('some-container');