Change iterable hard return type to array soft return type

[koriym]

RowInterfaceの戻り値をiterableからphpdocのarray型にします。

pros

• 配列アクセスの警告が出ない
• PHPレベルでは互換性維持
• function Foo(iterable $list)にも値を渡せる

cons

• QAツールでエラー
  • array()キャストでredundantの警告エラーが出ます。

[codecov]

Codecov Report

Merging #17 (95ef480) into 1.x (fe95426) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##                1.x      #17   +/-   ##
=========================================
  Coverage     93.06%   93.06%           
  Complexity       57       57           
=========================================
  Files            10       10           
  Lines           202      202           
=========================================
  Hits            188      188           
  Misses           14       14           

Impacted Files	Coverage Δ	Complexity Δ
src/SqlQueryModule.php	100.00% <100.00%> (ø)	6.00 <0.00> (ø)
src/SqlQueryRow.php	100.00% <100.00%> (ø)	3.00 <2.00> (ø)
src/SqlQueryRowList.php	95.45% <100.00%> (ø)	8.00 <7.00> (ø)
src/WebQuery.php	100.00% <100.00%> (ø)	3.00 <2.00> (ø)

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