Update dependency com_googlesource_code_re2
Update dependency com_googlesource_code_re2

To version 2020-04-01.

PiperOrigin-RevId: 307126893
Change-Id: Ifdb76eed882aaa4b0db4faf89f650349125baf48

google/asylo,google/asylo,google/asylo,google/asylo,google/asylo,google/asylo