Change inline configuration format

[fregante]

Prepare for #9

- # DO NOT EDIT BLOW, USE: npx ghat fregante/ghatemplates/node --exclude jobs.Test
+ # FILE GENERATED WITH: npx ghat
+ # SOURCE: https://github.com/fregante/ghatemplates
+ # OPTIONS: {"source":"fregante/ghatemplates/node","exclude":["jobs.Test"]}

Advantages:

• The command to run is now just npx ghat
• There's a full repo URL (clickable for RGH users)
• No cross-platform issues when creating/parsing argv from a string

Disadvantages:

• A bit longer
• Can no longer be copy-pasted as a whole across repositories 😕

[fregante]

Change:

- # FILE GENERATED WITH: npx ghat
+ # FILE GENERATED WITH: npx ghat fregante/ghatemplates/node
  # SOURCE: https://github.com/fregante/ghatemplates
- # OPTIONS: {"source":"fregante/ghatemplates/node","exclude":["jobs.Test"]}
+ # OPTIONS: {"exclude":["jobs.Test"]}

Advantages over the previous version:

• It can still be partially copy-pasted across repositories
• The OPTIONS line only appears if there were options passed