Fixed installation of sqlsrv and eio PECL packages

1. Added `os` and `arch` as valid dependency types
2. Removed testing of PHP_Timer and PHPUnit_MockObject as their channels do not exist anymore
3. Added .gitignore
4. Added dev-dependency on PHPUnit as otherwise the tests are incompatible with the latest PHPUnit 6

Fixes #6, #8

.gitignore

@@ -0,0 +1,3 @@
+composer.lock
+tests/tmp
+vendor

composer.json

@@ -8,6 +8,7 @@
         "corneltek/curlkit": "1.0.x-dev"
     },
     "require-dev": {
+        "phpunit/phpunit": "^5.7",
         "corneltek/phpunit-testmore": "dev-master"
     },
     "license": "MIT",

src/PEARX/Package.php

@@ -267,16 +267,19 @@ public function getContentsByRole($role)
         });
     }
 
-
-
     public function validateDependencyType($type)
     {
-        if(    $type != 'php'
-            && $type != 'pearinstaller'
-            && $type != 'extension'
-            && $type != 'package' )
-            throw new Exception('invalid pear dependency type.');
+        switch ($type) {
+            case 'arch':
+            case 'extension':
+            case 'os':
+            case 'package':
+            case 'pearinstaller':
+            case 'php':
+                return;
+        }
 
+        throw new Exception('Unsupported pear dependency type: ' . $type);
     }
 
     /**