chore: update to Go 1.15 (#1716)

Go 1.13 went out of support when 1.15 came out a few months ago, so
let's get everything bumped up.

.circleci/config.yml

@@ -706,7 +706,7 @@ jobs:
 
   package-and-push-system-local:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -732,7 +732,7 @@ jobs:
 
   package-and-push-system-dev:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -750,7 +750,7 @@ jobs:
 
   package-and-push-system-rc:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -768,7 +768,7 @@ jobs:
 
   package-and-push-system-release:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -949,7 +949,7 @@ jobs:
 
   lint-go:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -962,7 +962,7 @@ jobs:
 
   build-go:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -979,7 +979,7 @@ jobs:
 
   build-proto:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:
@@ -993,7 +993,7 @@ jobs:
 
   test-unit-go:
     docker:
-      - image: cimg/go:1.13
+      - image: cimg/go:1.15
         environment:
           GO111MODULE: "on"
     steps:

CONTRIBUTING.md

@@ -48,7 +48,7 @@ git clone git@github.com:determined-ai/determined.git
 
 #### Prerequisites
 
-- Go (>= 1.13)
+- Go (>= 1.15)
 - Python (>= 3.6, < 3.8)
 - Node (>= 12)
 - NPM (>= 6.12)

agent/go.mod

@@ -1,6 +1,6 @@
 module github.com/determined-ai/determined/agent
 
-go 1.12
+go 1.15
 
 require (
 	github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect

master/go.mod

@@ -1,5 +1,7 @@
 module github.com/determined-ai/determined/master
 
+go 1.15
+
 require (
 	cloud.google.com/go v0.58.0
 	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
@@ -65,5 +67,3 @@ require (
 replace github.com/determined-ai/determined/proto => ../proto
 
 replace github.com/docker/docker v1.13.1 => github.com/docker/engine v1.4.2-0.20191113042239-ea84732a7725
-
-go 1.13

proto/go.mod

@@ -1,6 +1,6 @@
 module github.com/determined-ai/determined/proto
 
-go 1.13
+go 1.15
 
 require (
 	github.com/bufbuild/buf v0.12.1