[Dev Deps] update covert, tape; remove unnecessary tap

Author: ljharb

package.json

@@ -4,20 +4,22 @@
     "description": "parse argument options",
     "main": "index.js",
     "devDependencies": {
-        "tape": "~1.0.4",
-        "tap": "~0.4.0"
+        "tape": "^5.6.1"
     },
     "scripts": {
         "prepack": "npmignore --auto --commentLines=auto",
-        "test": "tap test/*.js"
+        "test": "tape test/*.js"
     },
-    "testling" : {
-        "files" : "test/*.js",
-        "browsers" : [
+    "testling": {
+        "files": "test/*.js",
+        "browsers": [
             "ie/6..latest",
-            "ff/5", "firefox/latest",
-            "chrome/10", "chrome/latest",
-            "safari/5.1", "safari/latest",
+            "ff/5",
+            "firefox/latest",
+            "chrome/10",
+            "chrome/latest",
+            "safari/5.1",
+            "safari/latest",
             "opera/12"
         ]
     },