Merge pull request #3 from ipfs/feat/bump-to-1.15

Chore: bump go.mod and testing to go1.15

.travis.yml

@@ -4,7 +4,7 @@ os:
 language: go
 
 go:
-  - 1.14.x
+  - 1.15.x
 
 env:
   global:

go.mod

@@ -28,4 +28,4 @@ require (
 	github.com/whyrusleeping/base32 v0.0.0-20170828182744-c30ac30633cc
 )
 
-go 1.14
+go 1.15