store Guru API response in GURU_SYNC_RESPONSE

The result of the API call to https://api.getguru.com/app/contentsyncupload will be stored in env as GURU_SYNC_RESPONSE. Generally this will be of the form { "jobId" : "UUID" }

Fix resource directory path replacement

1.5.2

Fix resource directory path replacement

validate Tags in Collection; Fix resource directory path replacement

• fix a bug with resource path replacement (could create malformed resource links)
• ensure that collection.yaml contains all Tags from Cards

Fix YAML filenames for boards/boardgroups & support sections

• use translated board(group) titles as YAML filenames
• fix board YAML validation to support Sections

Allow path to source file to be included in footer

• GURU_CARD_FOOTER can now include the path (__CARDPATH__) to the specific Markdown or HTML file from which it was generated. For example, if the footer [EDIT THIS CARD](https://github.com/${{ github.repository }}/tree/master/__CARDPATH__) was specified for https://github.com/peckjon/github-to-guru/blob/master/README.md, the resulting Card would contain the footer [EDIT THIS CARD](https://github.com/peckjon/github-to-guru/tree/master/Readme.md

Add support for resources directory, and update axios

• add support for relative-linked files and embeds (via a resources directory)
• resolve a security vulnerability in axios 0.19

Add automatic card footers

Added support for GURU_CARD_FOOTER: automatically append a footer to every card in the Collection

Bugfix: pre-create tmp dirs

1.1.1

pre-create all tmp dirs

Verify existence of files referenced by YAML configs

• check that GURU_CARD_DIR != GURU_BOARD_DIR != GURU_BOARDGROUP_DIR
• check that files referenced by cards.yaml exist
• check that cards referenced by boards.yaml exist
• check that boards referenced by boardsgroups.yaml exist

Update to @actions/core 1.2.6

Bring various dependencies up-to-date:

• @actions/core 1.2.6
• @actions/exec 1.0.4
• @actions/github 2.2.0
• fs-extra 9.0.1
• yaml 1.10.0