fix!: load asset images for tests

[Kirpal]

Description

Closes #16 .

I also made a (breaking) refactor to use a builder instead of a widget, which should prevent state from being unintentionally maintained between the ci and platform test runs. Also, what do we think about including precacheImages in this package?

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[github-actions]

LCOV of commit 2ec9f84 during alchemist #35

Summary coverage rate:
  lines......: 100.0% (454 of 454 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate:
                                     |Lines       |Functions  |Branches    
  Filename                           |Rate     Num|Rate    Num|Rate     Num
  =========================================================================
  lib/src/golden_test.dart           | 100%     35|    -     0|    -      0
  lib/src/golden_test_adapter.dart   | 100%     78|    -     0|    -      0
  lib/src/golden_test_runner.dart    | 100%     21|    -     0|    -      0

[github-actions]

LCOV of commit 4c43b97 during alchemist #36

Summary coverage rate:
  lines......: 98.3% (465 of 473 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate:
                                     |Lines       |Functions  |Branches    
  Filename                           |Rate     Num|Rate    Num|Rate     Num
  =========================================================================
  lib/src/golden_test.dart           | 100%     35|    -     0|    -      0
  lib/src/golden_test_adapter.dart   | 100%     78|    -     0|    -      0
  lib/src/golden_test_runner.dart    | 100%     21|    -     0|    -      0
  lib/src/pumps.dart                 |68.0%     25|    -     0|    -      0

⛔ The code coverage is too low. Expected at least 100.

[github-actions]

LCOV of commit 2c6cfce during alchemist #37

Summary coverage rate:
  lines......: 100.0% (473 of 473 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate:
                                     |Lines       |Functions  |Branches    
  Filename                           |Rate     Num|Rate    Num|Rate     Num
  =========================================================================
  lib/src/golden_test.dart           | 100%     35|    -     0|    -      0
  lib/src/golden_test_adapter.dart   | 100%     78|    -     0|    -      0
  lib/src/golden_test_runner.dart    | 100%     21|    -     0|    -      0
  lib/src/pumps.dart                 | 100%     25|    -     0|    -      0

[github-actions]

LCOV of commit 43ece00 during alchemist #38

Summary coverage rate:
  lines......: 100.0% (473 of 473 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate:
                                     |Lines       |Functions  |Branches    
  Filename                           |Rate     Num|Rate    Num|Rate     Num
  =========================================================================
  lib/src/golden_test.dart           | 100%     35|    -     0|    -      0
  lib/src/golden_test_adapter.dart   | 100%     78|    -     0|    -      0
  lib/src/golden_test_runner.dart    | 100%     21|    -     0|    -      0
  lib/src/pumps.dart                 | 100%     25|    -     0|    -      0

[marcossevilla]

this is looking great! 🔥 had a couple of nit comments

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@3db24f7). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             main       #25   +/-   ##
========================================
  Coverage        ?   100.00%           
========================================
  Files           ?        12           
  Lines           ?       483           
  Branches        ?         0           
========================================
  Hits            ?       483           
  Misses          ?         0           
  Partials        ?         0           

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[marcossevilla]

lgtm 💯