Remove optional tests flag from linter

Gopkg.lock

@@ -20,10 +20,10 @@
   revision = "368acae73d1569f0495b00991aaa85ec27d6ee8e"
 
 [[projects]]
-  branch = "master"
   name = "github.com/matryer/is"
   packages = ["."]
-  revision = "be846f6cea707577c0d3a1e055d6cb719b68d533"
+  revision = "9c9f59466947e14647c98703d408d5d6d985648d"
+  version = "v1.0.0"
 
 [[projects]]
   branch = "master"
@@ -70,7 +70,7 @@
     "blake2b",
     "ssh/terminal"
   ]
-  revision = "5ba7f63082460102a45837dbd1827e10f9479ac0"
+  revision = "027cca12c2d63e3d62b670d901e8a2c95854feec"
 
 [[projects]]
   branch = "master"
@@ -79,7 +79,7 @@
     "http/httpguts",
     "idna"
   ]
-  revision = "1e491301e022f8f977054da4c2d852decd59571f"
+  revision = "db08ff08e8622530d9ed3a0e8ac279f6d4c02196"
 
 [[projects]]
   branch = "master"
@@ -89,7 +89,7 @@
     "unix",
     "windows"
   ]
-  revision = "c11f84a56e43e20a78cee75a7c034031ecf57d1f"
+  revision = "6c888cc515d3ed83fc103cf1d84468aad274b0a7"
 
 [[projects]]
   name = "golang.org/x/text"
@@ -115,6 +115,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "23fa3d7da0ea4b2f0e7ce3ea8744e41e550b3d7be5f0f0783e6ac0bb5b821508"
+  inputs-digest = "23bebd60feeb7a8199093dfad639c43cea63091672e649b80203796f7117997c"
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -30,8 +30,8 @@
   name = "github.com/mastertinner/adapters"
 
 [[constraint]]
-  branch = "master"
   name = "github.com/matryer/is"
+  version = "1.0.0"
 
 [[constraint]]
   branch = "master"

Makefile

@@ -4,7 +4,7 @@ all:
 	go build ./cmd/s3manager
 
 lint:
-	golangci-lint run --tests
+	golangci-lint run --enable-all
 
 test:
 	go test -race -cover ./...