Ba/adding search export

[bradleyandrick]

Related Issue(s):

• NA

Proposed Changes:

1. Adds simple export feature of search results as geojson
2. Small refactor of call to action button to align with export button style
3. Fix version number in package-lock.json

PR Checklist:

• [X] I have added my changes to the CHANGELOG or a CHANGELOG entry is not required.