add xlswriter support

config/ext.json

@@ -367,6 +367,15 @@
     "tokenizer": {
         "type": "builtin"
     },
+    "xlswriter": {
+        "type": "external",
+        "source": "xlswriter",
+        "arg-type": "custom",
+        "ext-depends": [
+            "zlib",
+            "zip"
+        ]
+    },
     "xml": {
         "type": "builtin",
         "arg-type": "custom",

config/source.json

@@ -391,6 +391,16 @@
             "path": "LICENSE"
         }
     },
+    "xlswriter": {
+        "type": "url",
+        "url": "http://pecl.php.net/get/xlswriter",
+        "path": "php-src/ext/xlswriter",
+        "filename": "xlswriter.tgz",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "xz": {
         "type": "filelist",
         "url": "https://tukaani.org/xz/",