Bugfix/observer collections

[nank1ro]

The method didUpdateSignal of SolidartObserver was not triggered for collections.

[codecov[bot]]

Codecov Report

Merging #80 (cbdc350) into main (5a9b679) will not change coverage. The diff coverage is 100.00%.

Additional details and impacted files

[](https://app.codecov.io/gh/nank1ro/solidart/pull/80?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexandru+Mariuti) ```diff @@ Coverage Diff @@ ## main #80 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 21 21 Lines 1238 1240 +2 ========================================= + Hits 1238 1240 +2 ``` | [Files](https://app.codecov.io/gh/nank1ro/solidart/pull/80?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexandru+Mariuti) | Coverage Δ | | |---|---|---| | [...ckages/solidart/lib/src/core/collections/list.dart](https://app.codecov.io/gh/nank1ro/solidart/pull/80?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexandru+Mariuti#diff-cGFja2FnZXMvc29saWRhcnQvbGliL3NyYy9jb3JlL2NvbGxlY3Rpb25zL2xpc3QuZGFydA==) | `100.00% <100.00%> (ø)` | | | [...ackages/solidart/lib/src/core/collections/map.dart](https://app.codecov.io/gh/nank1ro/solidart/pull/80?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexandru+Mariuti#diff-cGFja2FnZXMvc29saWRhcnQvbGliL3NyYy9jb3JlL2NvbGxlY3Rpb25zL21hcC5kYXJ0) | `100.00% <100.00%> (ø)` | | | [...ackages/solidart/lib/src/core/collections/set.dart](https://app.codecov.io/gh/nank1ro/solidart/pull/80?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexandru+Mariuti#diff-cGFja2FnZXMvc29saWRhcnQvbGliL3NyYy9jb3JlL2NvbGxlY3Rpb25zL3NldC5kYXJ0) | `100.00% <100.00%> (ø)` | | | [packages/solidart/lib/src/core/resource.dart](https://app.codecov.io/gh/nank1ro/solidart/pull/80?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexandru+Mariuti#diff-cGFja2FnZXMvc29saWRhcnQvbGliL3NyYy9jb3JlL3Jlc291cmNlLmRhcnQ=) | `100.00% <ø> (ø)` | |