Add argparse (#915)

packages.json

@@ -11213,6 +11213,19 @@
     "license": "MIT",
     "web": "https://github.com/juancarlospaco/nim-usagov"
   },
+  {
+    "name": "argparse",
+    "url": "https://github.com/iffy/nim-argparse",
+    "method": "git",
+    "tags": [
+      "cli",
+      "argparse",
+      "optparse"
+    ],
+    "description": "WIP strongly-typed argument parser with sub command support",
+    "license": "MIT",
+    "doc": "https://www.iffycan.com/nim-argparse/argparse.html"
+  },
   {
     "name": "markdown",
     "url": "https://github.com/soasme/nim-markdown",