new icon: astro (original, original-wordmark, plain, plain-wordmark) (#1350)

* bump npm version to v2.15.1

* new icon: Astro

* Fix `plain-wordmark` filename

* Changed viewBox to 0 0 128 128

* Path merged for plain icons

* Removed Unnecessary `<g />`  tag

Co-authored-by: Clemens Bastian <8781699+amacado@users.noreply.github.com>
Co-authored-by: Amacado <clemens.bastian@gmail.com>
Co-authored-by: Thomas Bui <43018778+Thomas-Boi@users.noreply.github.com>
Co-authored-by: David Leal <halfpacho@gmail.com>

devicon.json

@@ -536,6 +536,29 @@
         "color": "#ef7b4d",
         "aliases": []
     },
+    {
+        "name": "astro",
+        "altnames": [],
+        "tags": [
+            "static site generator",
+            "framework",
+            "web-development"
+        ],
+        "versions": {
+            "svg": [
+                "original",
+                "original-wordmark",
+                "plain",
+                "plain-wordmark"
+            ],
+            "font": [
+                "plain",
+                "plain-wordmark"
+            ]
+        },
+        "color": "#ff5d01",
+        "aliases": []
+    },
     {
         "name": "atom",
         "altnames": [],