fix: nameVerFromPkgSnapshot() always returns name and version

package.json

@@ -54,7 +54,7 @@
     "@types/js-yaml": "^3.10.1",
     "@types/node": "^9.3.0",
     "@types/ramda": "^0.25.12",
-    "dependency-path": "^1.0.0",
+    "dependency-path": "^1.2.1",
     "get-npm-tarball-url": "^2.0.1",
     "js-yaml": "^3.8.4",
     "load-yaml-file": "^0.1.0",

shrinkwrap.yaml

@@ -1506,7 +1506,7 @@ specifiers:
   '@types/node': ^9.3.0
   '@types/ramda': ^0.25.12
   '@types/tape': ^4.2.30
-  dependency-path: ^1.0.0
+  dependency-path: ^1.2.1
   get-npm-tarball-url: ^2.0.1
   js-yaml: ^3.8.4
   load-yaml-file: ^0.1.0

src/nameVerFromPkgSnapshot.ts

@@ -8,10 +8,8 @@ export default (
   if (!pkgSnapshot.name) {
     const pkgInfo = dp.parse(relDepPath)
     return {
-      // tslint:disable:no-string-literal
-      name: pkgInfo['name'],
-      version: pkgInfo['version'],
-      // tslint:enable:no-string-literal
+      name: pkgInfo.name as string,
+      version: pkgInfo.version as string,
     }
   }
   return {