Enable parallel circleci build

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

.circleci/config.yml

@@ -2,7 +2,7 @@
 version: 2.1
 
 orbs:
-  prometheus: prometheus/prometheus@0.8.0
+  prometheus: prometheus/prometheus@0.11.0
   go: circleci/go@0.2.0
 
 jobs:
@@ -19,7 +19,7 @@ jobs:
         command: sudo rm -rf /usr/local/go
     # Whenever the Go version is updated here, .promu.yml should also be updated.
     - go/install:
-        version: "1.14"
+        version: "1.16"
     - run:
         name: Remove generated code
         command: make clean
@@ -124,6 +124,7 @@ workflows:
             only: /.*/
     - prometheus/build:
         name: build
+        parallelism: 8
         filters:
           tags:
             only: /.*/

.promu.yml

@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .travis.yml and
     # .circle/config.yml should also be updated.
-    version: 1.14
+    version: 1.16
 repository:
     path: github.com/prometheus/alertmanager
 build:
@@ -24,25 +24,11 @@ tarball:
         - NOTICE
 crossbuild:
     platforms:
-        - linux/amd64
+        - darwin
-        - linux/386
+        - dragonfly
-        - darwin/amd64
+        - freebsd
-        - darwin/386
+        - illumos
-        - windows/amd64
+        - linux
-        - windows/386
+        - netbsd
-        - freebsd/amd64
+        - openbsd
-        - freebsd/386
+        - windows
-        - openbsd/amd64
-        - openbsd/386
-        - netbsd/amd64
-        - netbsd/386
-        - dragonfly/amd64
-        - linux/arm
-        - linux/arm64
-        - freebsd/arm
-        - netbsd/arm
-        - linux/ppc64
-        - linux/ppc64le
-        - linux/mips64
-        - linux/mips64le
-        - linux/s390x

Makefile.common

@@ -78,7 +78,7 @@ ifneq ($(shell which gotestsum),)
 endif
 endif
 
-PROMU_VERSION ?= 0.10.0
+PROMU_VERSION ?= 0.11.1
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
 GOLANGCI_LINT :=