ToranoanaResolverで、OGP画像の代わりになりそうなサムネ画像を取得する

[shibafu528]

OGP画像が代替イメージになっててどうしようもないので、商品画像の1枚目を取ってくるようにした。

fix #235

[codecov]

Codecov Report

Merging #243 into develop will increase coverage by 1.15%.
The diff coverage is 100%.

@@              Coverage Diff              @@
##             develop     #243      +/-   ##
=============================================
+ Coverage      22.47%   23.63%   +1.15%     
- Complexity       308      309       +1     
=============================================
  Files             59       59              
  Lines           1090     1096       +6     
=============================================
+ Hits             245      259      +14     
+ Misses           845      837       -8

Impacted Files	Coverage Δ	Complexity Δ
app/MetadataResolver/ToranoanaResolver.php	93.33% <100%> (+93.33%)	4 <0> (+1)	⬆️

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[shibafu528]

refs #42