Fix minor phpdoc mismatches with the code(detected by phan)

Author: TysonAndre

DateFormatter/DateFormat/FullTransformer.php

@@ -133,7 +133,7 @@ public function formatReplace($dateChars, $dateTime)
      * @param \DateTime $dateTime A configured DateTime object to use to perform the date calculation
      * @param string    $value    String to convert to a time value
      *
-     * @return int The corresponding Unix timestamp
+     * @return int|false The corresponding Unix timestamp
      *
      * @throws \InvalidArgumentException When the value can not be matched with pattern
      */

DateFormatter/IntlDateFormatter.php

@@ -348,7 +348,7 @@ public function getPattern()
     /**
      * Returns the formatter's time type.
      *
-     * @return string The time type used by the formatter
+     * @return int The time type used by the formatter
      *
      * @see http://www.php.net/manual/en/intldateformatter.gettimetype.php
      */
@@ -433,7 +433,7 @@ public function localtime($value, &$position = 0)
      *                         contain -1 otherwise it will contain the position at which parsing
      *                         ended. If $parse_pos > strlen($value), the parse fails immediately.
      *
-     * @return string Parsed value as a timestamp
+     * @return int Parsed value as a timestamp
      *
      * @see http://www.php.net/manual/en/intldateformatter.parse.php
      *

Locale/Locale.php

@@ -315,5 +315,7 @@ public static function setDefault($locale)
         if ('en' !== $locale) {
             throw new MethodNotImplementedException(__METHOD__);
         }
+
+        return true;
     }
 }

NumberFormatter/NumberFormatter.php

@@ -686,7 +686,7 @@ protected function resetError()
      * @param float  $value    The numeric currency value
      * @param string $currency The 3-letter ISO 4217 currency code indicating the currency to use
      *
-     * @return string The rounded numeric currency value
+     * @return float The rounded numeric currency value
      *
      * @see http://en.wikipedia.org/wiki/Swedish_rounding
      * @see http://www.docjar.com/html/api/com/ibm/icu/util/Currency.java.html#1007