Bump version to 1.5.0 (ossf#152)

Signed-off-by: Oliver Chang <oliverchang@users.noreply.github.com>

Update schema.md

Signed-off-by: Oliver Chang <oliverchang@users.noreply.github.com>

Bump version.

Signed-off-by: Oliver Chang <oliverchang@users.noreply.github.com>

Add GitHub Actions and Pub to the ecosystems list (ossf#74)

* Add GitHub Actions and Pub to the ecosystems list

This adds GitHub Actions and Pub to the documented list of defined ecosystems. The description for Pub is the wording taken directly from their website, but open to feedback if you'd like it to follow a specific pattern.

There are no validations on the ecosystems defined in the schema docs, so the validation JSON has not been updated.

* Clarify formatting of Actions name

Improve pseudocode for evaluation. (ossf#29)

Improve the pseudocode to cover matching `affected.versions` and
`affected.package` as well.

Link to this from earlier in the spec.

add schema_version and define how to use it (ossf#17)

* Add a schema_version field

* Use SemVer instead of SchemaVer for schema_version format

* Updating docs with suggested changes to schema_version field

* Bump schema version to 1.1.0

Fix invalid JSON examples (ossf#6)

Update README.md