build: update CI builds to use go 1.15.7#4961

Merged

Roasbeef merged 1 commit intolightningnetwork:masterfrom Roasbeef:ci-go-1-15-7

Feb 4, 2021

+4-4

Commits on Feb 4, 2021

build: update CI builds to use go 1.15.7
Roasbeef
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