Fix: format & lint (#1759)

* Fix: gci command for formatting code
* Chore: format code
* Fix: replace golint with revive

.github/linters/.golangci.yml

@@ -2,14 +2,12 @@ run:
   timeout: 5m
   skip-files:
     - generated.*
-
 issues:
   new: true
   exclude-rules:
     - linters:
-      - staticcheck
+        - staticcheck
       text: "SA1019:"
-
 linters:
   enable:
     - asciicheck
@@ -19,13 +17,13 @@ linters:
     - gofmt
     - gofumpt
     - goimports
-    - golint
     - goprintffuncname
     - gosimple
     - govet
     - ineffassign
     - misspell
     - nakedret
+    - revive
     - rowserrcheck
     - staticcheck
     - structcheck
@@ -39,7 +37,11 @@ linters:
     - deadcode
     - errcheck
     - unused
-
 linters-settings:
   goimports:
     local-prefixes: github.com/v2fly/v2ray-core
+  revive:
+    rules:
+      - name: blank-imports
+        severity: warning
+        disabled: true