Update build

.drone.yml

@@ -1,5 +1,6 @@
 ---
 kind: pipeline
+type: docker
 name: testing
 
 platform:
@@ -7,8 +8,37 @@ platform:
   arch: amd64
 
 steps:
+- name: environment
+  pull: always
+  image: golang:1.15
+  commands:
+  - go version
+  - go env
+  volumes:
+  - name: gopath
+    path: /go
+
+- name: staticcheck
+  pull: never
+  image: golang:1.15
+  commands:
+  - go run honnef.co/go/tools/cmd/staticcheck ./...
+  volumes:
+  - name: gopath
+    path: /go
+
+- name: lint
+  pull: never
+  image: golang:1.15
+  commands:
+  - go run golang.org/x/lint/golint -set_exit_status ./...
+  volumes:
+  - name: gopath
+    path: /go
+
 - name: vet
-  image: golang:1.12
+  pull: never
+  image: golang:1.15
   commands:
   - go vet ./...
   volumes:
@@ -16,9 +46,10 @@ steps:
     path: /go
 
 - name: test
-  image: golang:1.12
+  pull: never
+  image: golang:1.15
   commands:
-  - go test -cover ./...
+  - go test -cover -v ./...
   volumes:
   - name: gopath
     path: /go
@@ -27,8 +58,4 @@ volumes:
 - name: gopath
   temp: {}
 
-trigger:
+...
-  ref:
-  - refs/heads/master
-  - refs/tags/**
-  - refs/pull/**