build with Go 1.15 (#604)

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.14.x'
+          go-version: '1.15.x'
 
       - name: Checkout
         uses: actions/checkout@v2

.github/workflows/verify.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: '1.14.x'
+        go-version: '1.15.x'
       id: go
 
     - name: Check out code

.travis.yml

@@ -5,7 +5,7 @@ services:
   - mysql
   - postgresql
 go:
-  - "1.14"
+  - "1.15"
 branches:
   only:
     - main

docs/en/how_to_setup_object_storage.md

@@ -510,7 +510,7 @@ $ sudo apt-get install librados-dev
 $ sudo yum install librados-devel
 ```
 
-Then compile JuiceFS for Ceph (ensure you have Go 1.14+ and GCC 5.4+):
+Then compile JuiceFS for Ceph (ensure you have Go 1.15+ and GCC 5.4+):
 
 ```bash
 $ make juicefs.ceph

docs/zh_cn/how_to_setup_object_storage.md

@@ -517,7 +517,7 @@ $ sudo apt-get install librados-dev
 $ sudo yum install librados-devel
 ```
 
-然后为 Ceph 编译 JuiceFS（要求 Go 1.14+ 和 GCC 5.4+）：
+然后为 Ceph 编译 JuiceFS（要求 Go 1.15+ 和 GCC 5.4+）：
 
 ```bash
 $ make juicefs.ceph