refactor(kitsu): use merge-options instead of Object.assign

Author: wopian

packages/kitsu/package.json

@@ -48,7 +48,8 @@
   "dependencies": {
     "axios": "^0.19.0",
     "kitsu-core": "^9.1.11",
-    "pluralize": "^8.0.0"
+    "pluralize": "^8.0.0",
+    "merge-options": "^2.0.0"
   },
   "size-limit": [
     {

packages/kitsu/src/index.js

@@ -1,5 +1,6 @@
 import { camel, deserialise, error, kebab, query, serialise, snake, splitModel } from 'kitsu-core'
 import axios from 'axios'
+import merge from 'merge-options'
 import pluralise from 'pluralize'
 import { camel, deserialise, error, kebab, query, serialise, snake, splitModel } from 'kitsu-core'
 
@@ -444,7 +445,7 @@ export default class Kitsu {
           camelCaseTypes: this.camel,
           pluralTypes: this.plural
         }),
-        headers: Object.assign(this.headers, headers),
+        headers: merge(this.headers, headers),
         params,
         paramsSerializer: /* istanbul ignore next */ p => query(p)
       })

yarn.lock

@@ -7370,6 +7370,11 @@ is-plain-obj@^1.0.0, is-plain-obj@^1.1.0:
   resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
   integrity sha1-caUMhCnfync8kqOQpKA7OfzVHT4=
 
+is-plain-obj@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-2.1.0.tgz#45e42e37fccf1f40da8e5f76ee21515840c09287"
+  integrity sha512-YWnfyRwxL/+SsrWYfOpUtz5b3YD+nyfkHvjbcanzk8zgyO4ASD67uVMRt8k5bM4lLMDnXfriRhOpemw+NfT1eA==
+
 is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-2.0.4.tgz#2c163b3fafb1b606d9d17928f05c2a1c38e07677"
@@ -8605,6 +8610,13 @@ merge-descriptors@1.0.1:
   resolved "https://registry.yarnpkg.com/merge-descriptors/-/merge-descriptors-1.0.1.tgz#b00aaa556dd8b44568150ec9d1b953f3f90cbb61"
   integrity sha1-sAqqVW3YtEVoFQ7J0blT8/kMu2E=
 
+merge-options@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/merge-options/-/merge-options-2.0.0.tgz#36ca5038badfc3974dbde5e58ba89d3df80882c3"
+  integrity sha512-S7xYIeWHl2ZUKF7SDeBhGg6rfv5bKxVBdk95s/I7wVF8d+hjLSztJ/B271cnUiF6CAFduEQ5Zn3HYwAjT16DlQ==
+  dependencies:
+    is-plain-obj "^2.0.0"
+
 merge-stream@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/merge-stream/-/merge-stream-2.0.0.tgz#52823629a14dd00c9770fb6ad47dc6310f2c1f60"