fix(store): disallow nullable actions in dispatch()

[pietzschke]

In this commit, we update the dispatch() implementation to account for nullable parameters.
For example, dispatch(null) is invalid because null is not a valid action.

We provide both runtime and compile-time checks. The runtime check is the code that throws an error
when the provided argument is nullable, while the compile-time check is a type that excludes
nullable types.

[nx-cloud]

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CI is running/has finished running commands for commit c6aadd2. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

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✅ Successfully ran 4 targets

• nx run-many --target=test --all --configuration=ci --maxWorkers=4
• nx run-many --target=lint --all --exclude=create-app
• nx lint-types store
• nx run-many --target=build --all

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[arturovt]

I adopted your change in one of the apps, but the build is now failing with TS2345: Argument of type 'unknown' is not assignable to parameter of type '{} | {}[]', indicating that this change is considered a breaking change.

[arturovt]

To adopt this change in a more user-friendly manner, we should include a check guarded by ngDevMode, throwing an error immediately if actions is == null. This change will only throw runtime errors in development mode, meaning that no production applications will be affected.

[pkg-pr-new]

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@ngxs/form-plugin

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@ngxs/devtools-plugin

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@ngxs/router-plugin

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@ngxs/websocket-plugin

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@ngxs/storage-plugin

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commit: c6aadd2

[bundlemon]

BundleMon

Files updated (1)

Status	Path	Size	Limits
❌	fesm2022/ngxs-store.mjs	100.89KB (+584B +0.57%)	102KB / +0.5%

Unchanged files (5)

Status	Path	Size	Limits
✅	fesm2022/ngxs-store-internals.mjs	11.64KB	13KB / +0.5%
✅	fesm2022/ngxs-store-internals-testing.mjs	6.83KB	7KB / +0.5%
✅	fesm2022/ngxs-store-operators.mjs	6.22KB	7KB / +0.5%
✅	fesm2022/ngxs-store-plugins.mjs	2.04KB	3KB / +0.5%
✅	fesm2022/ngxs-store-experimental.mjs	1.4KB	2KB / +0.5%

Total files change +584B +0.44%

Groups updated (2)

Status	Path	Size	Limits
✅	@ngxs/store(esm2022)[gzip] ./esm2022/**/*.mjs	223.42KB (+945B +0.41%)	+1%
✅	@ngxs/store(fesm2022)[gzip] ./fesm2022/*.mjs	30.85KB (+117B +0.37%)	+1%

Final result: ❌

View report in BundleMon website ➡️

---

Current branch size history | Target branch size history

[bundlemon]

BundleMon (NGXS Plugins)

Unchanged files (9)

Status	Path	Size	Limits
✅	Plugins(fesm2022)[gzip] storage-plugin/fesm2022/ngxs-storage-plugin.m js	4.15KB	+0.5%
✅	Plugins(fesm2022)[gzip] router-plugin/fesm2022/ngxs-router-plugin.mjs	3.2KB	+0.5%
✅	Plugins(fesm2022)[gzip] websocket-plugin/fesm2022/ngxs-websocket-plug in.mjs	2.64KB	+0.5%
✅	Plugins(fesm2022)[gzip] hmr-plugin/fesm2022/ngxs-hmr-plugin.mjs	2.61KB	+0.5%
✅	Plugins(fesm2022)[gzip] form-plugin/fesm2022/ngxs-form-plugin.mjs	2.59KB	+0.5%
✅	Plugins(fesm2022)[gzip] devtools-plugin/fesm2022/ngxs-devtools-plugin .mjs	2.23KB	+0.5%
✅	Plugins(fesm2022)[gzip] logger-plugin/fesm2022/ngxs-logger-plugin.mjs	2.03KB	+0.5%
✅	Plugins(fesm2022)[gzip] storage-plugin/fesm2022/ngxs-storage-plugin-i nternals.mjs	875B	+0.5%
✅	Plugins(fesm2022)[gzip] router-plugin/fesm2022/ngxs-router-plugin-int ernals.mjs	411B	+0.5%

No change in files bundle size

Unchanged groups (1)

Status	Path	Size	Limits
✅	All Plugins(fesm2022)[gzip] ./-plugin/fesm2022/.mjs	20.71KB	+0.5%

Final result: ✅

View report in BundleMon website ➡️

---

Current branch size history | Target branch size history

[bundlemon]

BundleMon (Integration Projects)

Files updated (1)

Status	Path	Size	Limits
✅	Main bundles(Gzip) hello-world-ng18/dist-integration/browser/mai n-(hash).js	71.83KB (+57B +0.08%)	+1%

Unchanged files (2)

Status	Path	Size	Limits
✅	Main bundles(Gzip) hello-world-ng17/dist-integration/main.(hash) .js	68.64KB	+1%
✅	Main bundles(Gzip) hello-world-ng16/dist-integration/main.(hash) .js	67.75KB	+1%

Total files change +66B +0.03%

Final result: ✅

View report in BundleMon website ➡️

---

Current branch size history | Target branch size history

[codeclimate]

Code Climate has analyzed commit c6aadd2 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 95.4% (0.0% change).

View more on Code Climate.