fix: fix manipulation of JsxSelfClosingElement

[odiak]

While I investigating #1409, I found suspicious code from stack trace.
Because it works as expected after fixing there, I made this pull request.

[odiak]

I also found some similar code pieces, though I'm not sure if they cause error.

ts-morph/packages/ts-morph/src/manipulation/nodeHandlers/RangeParentHandler.ts

Lines 89 to 90 in c126733

	while (!currentNodeChildren.done)
	this.straightReplace(currentNodeChildren.next(), newNodeChildren.next(), newSourceFile);

ts-morph/packages/ts-morph/src/manipulation/nodeHandlers/DefaultParentHandler.ts

Lines 64 to 65 in c126733

	while (!currentChildren.done)
	this.helper.handleForValues(this.straightReplacementNodeHandler, currentChildren.next(), newChildren.next(), newSourceFile);

ts-morph/packages/ts-morph/src/manipulation/nodeHandlers/UnwrapParentHandler.ts

Lines 50 to 51 in c126733

	while (!currentChildren.done)
	this.helper.handleForValues(this.straightReplacementNodeHandler, currentChildren.next(), newChildren.next(), newSourceFile);