feat(completion): add pseudo-keywords like int, bool, strict_types to completion

src/CompletionProvider.php

@@ -91,7 +91,23 @@ class CompletionProvider
         'var',
         'while',
         'xor',
-        'yield'
+        'yield',
+
+        // List of other reserved words (http://php.net/manual/en/reserved.other-reserved-words.php)
+        // (the ones which do not occur as actual keywords above.)
+        'int',
+        'float',
+        'bool',
+        'string',
+        'void',
+        'iterable',
+        'object',
+
+        // Pseudo keywords
+        'from', // As in yield from
+        'strict_types',
+        'ticks', // As in declare(ticks=1)
+        'encoding', // As in declare(encoding='EBCDIC')
     ];
 
     /**