Update dependencies to fix possible security issues

[php-coder]

$ npm audit
# npm audit report

ejs  <3.1.7
Severity: critical
ejs template injection vulnerability - https://github.com/advisories/GHSA-phwq-j96m-2c2q
fix available via `npm audit fix`
node_modules/ejs

minimatch  <3.0.5
Severity: high
minimatch ReDoS vulnerability - https://github.com/advisories/GHSA-f8q6-p94x-37v3
fix available via `npm audit fix`
node_modules/minimatch

minimist  <1.2.6
Severity: critical
Prototype Pollution in minimist - https://github.com/advisories/GHSA-xvch-5gv4-984h
fix available via `npm audit fix`
node_modules/minimist

3 vulnerabilities (1 high, 2 critical)

Related PRs: #14 and #18

[php-coder]

ejs (altogether with minimatch) has been updated in 8aa0c0c commit.
minimist has been updated in 99c0bb5 commit.