Matmul and mul

[coveralls]

Pull Request Test Coverage Report for Build 1020846503

• 106 of 122 (86.89%) changed or added relevant lines in 8 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-12.7%) to 87.302%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/qutip_tensorflow/core/data/matmul.py	19	22	86.36%
src/qutip_tensorflow/core/data/dense_tensor.py	40	53	75.47%
<!--	Total:	106	122	86.89%	-->

Totals
Change from base Build 1003986490:	-12.7%
Covered Lines:	110
Relevant Lines:	126

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💛 - Coveralls