Angular 4.4.1 已发布，更新内容：

Bug 修复

animations: do not leak DOM nodes/styling for host triggered animations (#18853) (1cc3fe2), closes #18606
common: fix improper packaging for @angular/common/http (#18613) (a203a95)
common: fix XSSI prefix stripping by using JSON.parse always (#18466) (8821723), closes #18396 #18453
compiler: normalize the locale name (#18963) (497e017)
core: complete EventEmitter in QueryList on component destroy (#18902) (7d137d7), closes #18741
tsc-wrapped: deduplicate metadata for re-exported modules (48ae1a6)
tsc-wrapped: fix metadata symbol reference (f6a7183)
upgrade: remove code setting id attribute. (#19182) (b20c5d2), closes #18446

功能特性

compiler: allow multiple exportAs names (#18723) (7ec28fe)
core: add option to remove blank text nodes from compiled templates (#18823) (b8b551c)

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