fix(package): require @nuxtjs/proxy as a peerDependency

package.json

@@ -15,23 +15,16 @@
     "release": "standard-version && git push --follow-tags && npm publish",
     "prepare": "npm run test"
   },
-  "eslintIgnore": [
-    "*.template.*"
-  ],
-  "files": [
-    "lib",
-    "src",
-    "dist"
-  ],
+  "eslintIgnore": ["*.template.*"],
+  "files": ["lib", "src", "dist"],
   "jest": {
     "testEnvironment": "node",
     "coverageDirectory": "./coverage/",
     "collectCoverage": true,
-    "collectCoverageFrom": [
-      "lib",
-      "test",
-      "!test/fixture"
-    ]
+    "collectCoverageFrom": ["lib", "test", "!test/fixture"]
+  },
+  "peerDependencies": {
+    "@nuxtjs/proxy": "^1.1.4"
   },
   "dependencies": {
     "@nuxtjs/proxy": "^1.1.4",
@@ -40,18 +33,18 @@
     "debug": "^3.1.0"
   },
   "devDependencies": {
-    "codecov": "^3.0.0",
-    "eslint": "^4.14.0",
-    "eslint-config-standard": "^11.0.0-beta.0",
-    "eslint-plugin-import": "^2.8.0",
-    "eslint-plugin-jest": "^21.5.0",
-    "eslint-plugin-node": "^5.2.1",
-    "eslint-plugin-promise": "^3.6.0",
-    "eslint-plugin-standard": "^3.0.1",
-    "eslint-plugin-vue": "^2.1.0",
-    "jest": "^22.0.4",
-    "jsdom": "^11.5.1",
-    "nuxt": "^1.1.1",
-    "standard-version": "^4.2.0"
+    "codecov": "latest",
+    "eslint": "latest",
+    "eslint-config-standard": "latest",
+    "eslint-plugin-import": "latest",
+    "eslint-plugin-jest": "latest",
+    "eslint-plugin-node": "latest",
+    "eslint-plugin-promise": "latest",
+    "eslint-plugin-standard": "latest",
+    "eslint-plugin-vue": "latest",
+    "jest": "latest",
+    "jsdom": "latest",
+    "nuxt": "latest",
+    "standard-version": "latest"
   }
 }