chore(package): update dependencies to fix vulnerabilities

[thomasjammet]

Current version of videojs/standard has critical npm vulnerabilities :

# npm audit report

ansi-regex  5.0.0
Severity: high
Inefficient Regular Expression Complexity in chalk/ansi-regex - https://github.com/advisories/GHSA-93q8-gq69-wqmw
fix available via `npm audit fix`
node_modules/ansi-regex

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

semver  <=5.7.1 || 6.0.0 - 6.3.0 || 7.0.0 - 7.5.1
Severity: moderate
semver vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-c2qf-rxjj-qqgw
semver vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-c2qf-rxjj-qqgw
semver vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-c2qf-rxjj-qqgw
fix available via `npm audit fix`
node_modules/conventional-changelog-writer/node_modules/semver
node_modules/git-semver-tags/node_modules/semver
node_modules/meow/node_modules/semver
node_modules/not-prerelease/node_modules/semver
node_modules/npm-run-all/node_modules/semver
node_modules/read-pkg/node_modules/semver
node_modules/semver

underscore  1.3.2 - 1.12.0
Severity: critical
Arbitrary Code Execution in underscore - https://github.com/advisories/GHSA-cf4h-3jhx-xvhq
fix available via `npm audit fix`
node_modules/underscore
  nomnom  >=1.6.0
  Depends on vulnerable versions of underscore
  node_modules/nomnom

word-wrap  <1.2.4
Severity: moderate
word-wrap vulnerable to Regular Expression Denial of Service - https://github.com/advisories/GHSA-j8xg-fqg3-53r7
fix available via `npm audit fix`
node_modules/word-wrap

6 vulnerabilities (2 moderate, 2 high, 2 critical)

This PR fixes all the vulnerabilities but needs first the following PR to be merged :
videojs/eslint-config-videojs#50

This would be a major version change I guess.

[thomasjammet]

Actually npm run test will not work, this should wait for the following PR :

videojs/eslint-config-videojs#50