Sort and adjust devDependencies in package.json

Author: ashtuchkin

package.json

@@ -29,14 +29,14 @@
         "stream": false
     },
     "devDependencies": {
-        "mocha": "^3.1.0",
-        "request": "~2.87.0",
-        "unorm": "*",
-        "errto": "*",
         "async": "*",
         "c8": "*",
-        "semver": "6.1.2",
-        "iconv": "2"
+        "errto": "*",
+        "iconv": "^2.3.5",
+        "mocha": "^3.5.3",
+        "request": "~2.87.0",
+        "semver": "~6.1.2",
+        "unorm": "*"
     },
     "dependencies": {
         "safer-buffer": ">= 2.1.2 < 3"