fix(plugin-js-packages): calculate total dependencies from package.json

[Tlacenka]

Closes #597

In this PR I fix the way of calculating outdated score. Now the number of all dependencies of a given type is used to create the ratio of outdated major dependencies.

At the moment, only one package.json can be referenced to calculate the total.

[nx-cloud]

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nx affected:e2e --parallel=3

✅ Successfully ran 1 target

• nx release --yes --dry-run

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[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared target commit 203aaa9 with source commit 0a72931.

🏷️ Categories

🏷️ Category	⭐ Current score	⭐ Previous score	🔄 Score change
Performance	🟡 57	🟢 90
Updates	🟡 89	🟡 80
Code coverage	🟡 80	🟡 80
Accessibility	🟢 100	🟢 100	–
Best Practices	🟢 100	🟢 100	–
SEO	🟡 86	🟡 86	–
PWA	🟡 63	🟡 63	–
Bug prevention	🟢 100	🟢 100	–
Code style	🟢 99	🟢 99	–
Security	🟢 95	🟢 95	–
Custom checks	🟡 67	🟡 67	–

🗃️ Groups

👍 2 groups improved, 👎 1 group regressed

🔌 Plugin	🗃️ Group	⭐ Current score	⭐ Previous score	🔄 Score change
Lighthouse	Performance	🟡 57	🟢 90
JS Packages	NPM outdated dependencies	🟡 89	🟡 80
Code coverage	Code coverage metrics	🟡 80	🟡 80

18 other groups are unchanged.

🛡️ Audits

👍 6 audits improved, 👎 10 audits regressed, 7 audits changed without impacting score

🔌 Plugin	🛡️ Audit	📏 Current value	📏 Previous value	🔄 Value change
Lighthouse	Minimizes main-thread work	🟥 6.2 s	🟩 1.9 s
Lighthouse	Avoid large layout shifts	🟩 4 elements found	🟥 5 elements found
Lighthouse	Avoid large layout shifts	🟩 15 layout shifts found	🟥 15 layout shifts found
Lighthouse	Total Blocking Time	🟥 1,750 ms	🟩 90 ms
Lighthouse	Max Potential First Input Delay	🟥 760 ms	🟨 220 ms
Lighthouse	Speed Index	🟨 5.2 s	🟩 1.8 s
Lighthouse	First Contentful Paint	🟨 2.7 s	🟩 1.1 s
Lighthouse	First Meaningful Paint	🟨 3.1 s	🟩 1.1 s
Lighthouse	Cumulative Layout Shift	🟩 0.006	🟨 0.147
Lighthouse	Time to Interactive	🟨 4.7 s	🟩 2.5 s
Lighthouse	Largest Contentful Paint	🟨 3.4 s	🟨 2.7 s
JS Packages	Outdated NPM dev dependencies.	🟨 57 outdated package versions (27 major, 24 minor, 5 patch, 1 prerelease)	🟨 57 outdated package versions (27 major, 24 minor, 5 patch, 1 prerelease)
JS Packages	Outdated NPM prod dependencies.	🟩 7 outdated package versions (1 major, 2 minor, 4 patch)	🟨 7 outdated package versions (1 major, 2 minor, 4 patch)
Code coverage	Line coverage	🟩 91 %	🟩 91 %
Code coverage	Function coverage	🟨 76 %	🟨 76 %
Code coverage	Branch coverage	🟨 83 %	🟨 83 %
Lighthouse	Metrics	🟩 4727	🟩 2484
Lighthouse	Properly size images	🟥 Potential savings of 240 KiB	🟥 Potential savings of 240 KiB
Lighthouse	JavaScript execution time	🟩 0.2 s	🟩 0.0 s
Lighthouse	Avoids enormous network payloads	🟩 Total size was 432 KiB	🟩 Total size was 432 KiB
Lighthouse	Uses efficient cache policy on static assets	🟨 11 resources found	🟨 11 resources found
Lighthouse	Server Backend Latencies	🟩 20 ms	🟩 10 ms
Lighthouse	Network Round Trip Times	🟩 0 ms	🟩 10 ms

499 other audits are unchanged.