Add history query

[cffan]

[coveralls]

Pull Request Test Coverage Report for Build 1401

• 48 of 51 (94.12%) changed or added relevant lines in 7 files are covered.
• 39 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.05%) to 77.616%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/compiler/ops.ts	6	7	85.71%
lib/ast/expression.ts	14	16	87.5%
<!--	Total:	48	51

Files with Coverage Reduction	New Missed Lines	%
lib/new-syntax/parser.ts	39	73.6%
<!--	Total:	39

Totals
Change from base Build 1399:	0.05%
Covered Lines:	10228
Relevant Lines:	12666

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💛 - Coveralls