Update golang version and reduce repeated builds

.drone.yml

@@ -36,10 +36,8 @@ steps:
 - name: test-plug
   image: alpine:latest
   commands:
-  - apk add --no-cache patch
-  - ./.install/neovim-source.sh
-  - nvim -version
-  - nvim +checkhealth +qa
+  - ./.install/repositories.sh
+  - apk add --no-cache neovim@community
   - ./.install/core.sh
   - ./.install/plug.sh
 ---
@@ -62,16 +60,16 @@ steps:
   - ./.install/golang-source.sh
   - go version
 - name: test-packr
-  image: alpine:latest
+  image: golang:1.13-alpine
   commands:
-  - ./.install/golang-source.sh
+  - ./.install/git.sh
   - ./.install/upx.sh
   - ./.install/packr.sh
 - name: test-caddy
-  image: alpine:latest
+  image: golang:1.13-alpine
   commands:
   - apk add --no-cache build-base
-  - ./.install/golang-source.sh
+  - ./.install/git.sh
   - ./.install/upx.sh
   - ./.install/caddy.sh
 ---

.versions

@@ -2,8 +2,8 @@
 
 export NEOVIM_VERSION=0.3.4
 
-export GOLANG_VERSION=1.11.4
-export GOLANG_HASH=4cfd42720a6b1e79a8024895fa6607b69972e8e32446df76d6ce79801bbadb15
+export GOLANG_VERSION=1.13.1
+export GOLANG_HASH=81f154e69544b9fa92b1475ff5f11e64270260d46e7e36c34aafc8bc96209358
 
 export NODE_VERSION=10.15.0
 export YARN_VERSION=1.13.0