3.18.1 (#228)

* chore(deps): npm audit fix

* chore(rel): 3.18.1

* docs: fix README badges

Author: mrodrig

README.md

@@ -1,15 +1,15 @@
 # json-2-csv
 **Convert JSON to CSV _or_ CSV to JSON**
 
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 This node module will convert an array of JSON documents to a CSV string.
 Column headings will be automatically generated based on the keys of the JSON documents. Nested documents will have a '.' appended between the keys.