feat(expect): add more methods

tests/.snapshots/success.txt

@@ -24,6 +24,11 @@
    PASS  Tests\Expect\toBeCallable
   ✓ pass
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeDirectory
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toBeEmpty
@@ -99,6 +104,11 @@
    PASS  Tests\Expect\toBeObject
   ✓ pass
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeReadableDirectory
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toBeResource
@@ -119,12 +129,22 @@
    PASS  Tests\Expect\toBeTrue
   ✓ strict comparisons
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toBeWritableDirectory
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toContain
   ✓ passes strings
   ✓ passes arrays
   ✓ failures
+  ✓ not failures
+
+   PASS  Tests\Expect\toCount
+  ✓ pass
+  ✓ failures
   ✓ not failures
 
    PASS  Tests\Expect\toEqual
@@ -137,7 +157,7 @@
   ✓ failures
   ✓ not failures
 
-   PASS  Tests\Expect\toHaveCount
+   PASS  Tests\Expect\toHaveKey
   ✓ pass
   ✓ failures
   ✓ not failures
@@ -312,5 +332,5 @@
    WARN  Tests\Visual\Success
   - visual snapshot of test suite on success
 
-  Tests:  6 skipped, 183 passed
-  Time:   5.77s
+  Tests:  6 skipped, 195 passed
+  Time:   5.27s