perf: make JSON metadata resolver a fn

[davidlj95]

Keep reducing bundle size #112

Also:

• Removes generics from types. Given used internally, this helps keeping things simple.
• Changes test names so they're not tied to code for consistency
• Removes not used anymore MaybeUndefined utility type

[davidlj95]

Current dependencies on/for this PR:

• main
  • PR perf: make JSON metadata resolver a fn #202 👈

This stack of pull requests is managed by Graphite.

[github-actions]

📦 Bundle size (Angular v16)

Git ref: b62ead8

Module file	Size	Base size	Difference
ngx-meta-core.mjs	3054 bytes (3.0KiB)	3172 bytes (3.1KiB)	-3.72%: -118 bytes (-118B)
ngx-meta-json-ld.mjs	402 bytes (402B)	402 bytes (402B)	No change
ngx-meta-open-graph.mjs	1247 bytes (1.3KiB)	1247 bytes (1.3KiB)	No change
ngx-meta-routing.mjs	897 bytes (897B)	897 bytes (897B)	No change
ngx-meta-standard.mjs	940 bytes (940B)	940 bytes (940B)	No change
ngx-meta-twitter-card.mjs	669 bytes (669B)	669 bytes (669B)	No change
Total	7209 bytes (7.1KiB)	7327 bytes (7.2KiB)	-1.61%: -118 bytes (-118B)

[github-actions]

📦 Bundle size (Angular v17)

Git ref: b62ead8

Module file	Size	Base size	Difference
ngx-meta-core.mjs	2803 bytes (2.8KiB)	2913 bytes (2.9KiB)	-3.77%: -110 bytes (-110B)
ngx-meta-json-ld.mjs	236 bytes (236B)	236 bytes (236B)	No change
ngx-meta-open-graph.mjs	930 bytes (930B)	930 bytes (930B)	No change
ngx-meta-routing.mjs	725 bytes (725B)	725 bytes (725B)	No change
ngx-meta-standard.mjs	829 bytes (829B)	829 bytes (829B)	No change
ngx-meta-twitter-card.mjs	515 bytes (515B)	515 bytes (515B)	No change
Total	6038 bytes (5.9KiB)	6148 bytes (6.1KiB)	-1.78%: -110 bytes (-110B)

[github-actions]

📦 Bundle size (Angular v15)

Git ref: b62ead8

Module file	Size	Base size	Difference
ngx-meta-core.mjs	3054 bytes (3.0KiB)	3172 bytes (3.1KiB)	-3.72%: -118 bytes (-118B)
ngx-meta-json-ld.mjs	402 bytes (402B)	402 bytes (402B)	No change
ngx-meta-open-graph.mjs	1247 bytes (1.3KiB)	1247 bytes (1.3KiB)	No change
ngx-meta-routing.mjs	897 bytes (897B)	897 bytes (897B)	No change
ngx-meta-standard.mjs	940 bytes (940B)	940 bytes (940B)	No change
ngx-meta-twitter-card.mjs	669 bytes (669B)	669 bytes (669B)	No change
Total	7209 bytes (7.1KiB)	7327 bytes (7.2KiB)	-1.61%: -118 bytes (-118B)

[github-actions]

🎉 This PR is included in version 1.0.0-alpha.33 🎉

The release is available on:

• npm package (@main dist-tag)
• GitHub release

Your semantic-release bot 📦🚀