Minor changes

• updated the babel transpiler to version 7.24 and Node.js used for it to current LTS version 20

Minor changes

• fetchJSON now does not add content-type: application/json header when calling fetch without options argument (See #18)

Patch changes

• lodash version updated to 4.17.21

• fetchJSON clones response before reading the body stream not to lock it when user wants to read it in a different way

• Updated lodash version to 4.17.19
• Updated dev dependencies

Updated to babel v7 therefore the transpiled packaged module is a little different.