Update dependencies

Can’t update gulp-mocha to 4.x as long as the issue regarding coverage isn’t fixed:
sindresorhus/gulp-mocha#159

Author: mischah

package.json

@@ -33,14 +33,14 @@
   "dependencies": {
     "chalk": "1.1.3",
     "superb": "1.3.0",
-    "title-case": "2.1.0",
-    "yeoman-generator": "1.0.0",
-    "yosay": "1.2.1"
+    "title-case": "^2.1.1",
+    "yeoman-generator": "^1.1.1",
+    "yosay": "^2.0.0"
   },
   "devDependencies": {
-    "codeclimate-test-reporter": "0.4.0",
-    "eslint": "3.12.2",
-    "eslint-config-xo-space": "0.15.0",
+    "codeclimate-test-reporter": "^0.4.1",
+    "eslint": "^3.19.0",
+    "eslint-config-xo-space": "^0.16.0",
     "gulp": "3.9.1",
     "gulp-coveralls": "0.1.4",
     "gulp-eslint": "3.0.1",
@@ -50,7 +50,7 @@
     "gulp-mocha": "3.0.1",
     "gulp-nsp": "2.4.2",
     "gulp-plumber": "1.1.0",
-    "yeoman-assert": "2.2.2",
+    "yeoman-assert": "^3.0.0",
     "yeoman-test": "1.6.0"
   },
   "eslintConfig": {