fix(package): update ejs to version 2.5.9

[gregswindle]

Pull Request (PR)

Description of change

Update ejs to version 2.5.9.

Associated issue(s)

Closes #31

• The acceptance criteria for all associated issues have been completed, tested, and validated.

PR check-list

✅ Please review and check the appropriate items.

1. Code standards compliance

• ESLint passes.

2. Code quality

• The quality gateways pass with an "A" grade.

Measure	Scores
Complexity
Duplications
Issues
Maintainability
Reliability
Security

3. Test coverage

• The source code is 100% covered with passing specs.

ℹ️ These tasks are not required to open a PR, and may be addresses while the PR is open.

[coveralls]

Coverage remained the same at 100.0% when pulling 0088b1a on greenkeeper/ejs-2.5.9 into fc5c048 on master.

[coveralls]

Coverage remained the same at 100.0% when pulling 0088b1a on greenkeeper/ejs-2.5.9 into fc5c048 on master.

[coveralls]

Coverage remained the same at 100.0% when pulling 0088b1a on greenkeeper/ejs-2.5.9 into fc5c048 on master.

[coveralls]

Coverage remained the same at 100.0% when pulling 0088b1a on greenkeeper/ejs-2.5.9 into fc5c048 on master.