use semver operators for dependencies (#1003)

Also relax version ranges from patch to minor.

package.json

@@ -54,29 +54,29 @@
     "test": "grunt test"
   },
   "dependencies": {
-    "camel-case": "3.0.x",
-    "clean-css": "4.2.x",
-    "commander": "2.19.x",
-    "he": "1.2.x",
-    "param-case": "2.1.x",
-    "relateurl": "0.2.x",
-    "uglify-js": "3.5.x"
+    "camel-case": "^3.0.0",
+    "clean-css": "^4.2.1",
+    "commander": "^2.19.0",
+    "he": "^1.2.0",
+    "param-case": "^2.1.1",
+    "relateurl": "^0.2.7",
+    "uglify-js": "^3.5.1"
   },
   "devDependencies": {
-    "grunt": "1.0.x",
-    "grunt-browserify": "5.3.x",
-    "grunt-contrib-uglify": "4.0.x",
-    "gruntify-eslint": "5.0.x",
-    "phantomjs-prebuilt": "2.1.x",
-    "qunit": "2.x"
+    "grunt": "^1.0.3",
+    "grunt-browserify": "^5.3.0",
+    "grunt-contrib-uglify": "^4.0.1",
+    "gruntify-eslint": "^5.0.0",
+    "phantomjs-prebuilt": "^2.1.16",
+    "qunit": "^2.9.2"
   },
   "benchmarkDependencies": {
-    "brotli": "1.3.x",
-    "chalk": "2.4.x",
-    "cli-table": "0.3.x",
-    "lzma": "2.3.x",
-    "minimize": "2.2.x",
-    "progress": "2.0.x"
+    "brotli": "^1.3.2",
+    "chalk": "^2.4.2",
+    "cli-table": "^0.3.1",
+    "lzma": "^2.3.2",
+    "minimize": "^2.2.0",
+    "progress": "^2.0.3"
   },
   "files": [
     "src/*.js",