chore: upgrade should and codecov

Author: bhovhannes

package.json

@@ -23,8 +23,8 @@
   },
   "devDependencies": {
     "@types/form-data": "^2.2.1",
-    "@types/mocha": "^2.2.45",
-    "codecov": "3.0.1",
+    "@types/mocha": "^5.2.1",
+    "codecov": "3.0.2",
     "dateformat": "3.0.3",
     "execa": "0.10.0",
     "fetch-mock": "5.13.1",
@@ -45,7 +45,7 @@
     "phantomjs-prebuilt": "2.1.16",
     "prettier": "1.13.4",
     "semver": "5.5.0",
-    "should": "13.1.1",
+    "should": "13.2.1",
     "ts-loader": "4.3.1",
     "tslib": "1.9.2",
     "tslint": "5.10.0",

tsconfig.json

@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
     "importHelpers": true,
     "module": "es6",
     "moduleResolution": "node",