Update Go and dependencies (#32)

.editorconfig

@@ -2,7 +2,7 @@ root = true
 
 [*]
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.15.3 AS builder
+FROM golang:1.15.7 AS builder
 
 WORKDIR /build
 

Makefile

@@ -24,6 +24,9 @@ install:
 	install -D -t $(DESTDIR)/usr/bin/ nextcloud-exporter
 	install -D -m 0644 -t $(DESTDIR)/lib/systemd/system/ contrib/nextcloud-exporter.service
 
+image:
+	docker build -t "xperimental/nextcloud-exporter:$(VERSION)" .
+
 clean:
 	rm -f nextcloud-exporter
 	rm -r dist

go.mod

@@ -1,11 +1,14 @@
 module github.com/xperimental/nextcloud-exporter
 
-go 1.13
+go 1.15
 
 require (
-	github.com/google/go-cmp v0.4.0
-	github.com/prometheus/client_golang v1.6.0
-	github.com/sirupsen/logrus v1.6.0
+	github.com/google/go-cmp v0.5.4
+	github.com/prometheus/client_golang v1.9.0
+	github.com/prometheus/procfs v0.3.0 // indirect
+	github.com/sirupsen/logrus v1.7.0
 	github.com/spf13/pflag v1.0.5
-	gopkg.in/yaml.v2 v2.3.0
+	golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0
 )