🐛 Fixed body length limit when uploading themes (#422)

refs #195
refs axios/axios#2781

- When large theme files are uploaded to the server they sometimes fail due to a body limit error. This limit was introduced in axios http library recently. The change is similar to the one introduced in #195 for the content size

packages/admin-api/lib/index.js

@@ -57,6 +57,7 @@ module.exports = function GhostAdminAPI(options) {
                 data,
                 headers,
                 maxContentLength: Infinity,
+                maxBodyLength: Infinity,
                 paramsSerializer(parameters) {
                     return Object.keys(parameters).reduce((parts, key) => {
                         const val = encodeURIComponent([].concat(parameters[key]).join(','));