Upgrade semver version to 5.5.0

package.json

@@ -43,7 +43,7 @@
     "queue-async": "1.1.0",
     "redis-mpool": "0.5.0",
     "request": "2.87.0",
-    "semver": "~5.3.0",
+    "semver": "5.5.0",
     "step": "~0.0.6",
     "step-profiler": "~0.3.0",
     "turbo-carto": "0.20.2",

yarn.lock

@@ -2160,7 +2160,7 @@ sax@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
 
-"semver@2 || 3 || 4 || 5", semver@^5.1.0, semver@^5.3.0, semver@~5.3.0:
+"semver@2 || 3 || 4 || 5", semver@^5.1.0, semver@^5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"