Removed go1.12 and added go1.15 to CI config (cucumber#356)

* Removed go1.12 and added go1.15 to CI config

* Updated release-notes

Author: lonnblad

.circleci/config.yml

@@ -4,15 +4,15 @@ orbs:
   codecov: codecov/[email protected]
 
 executors:
-  exec_go_1_12:
-    docker:
-      - image: circleci/golang:1.12.17
   exec_go_1_13:
     docker:
-      - image: circleci/golang:1.13.11
+      - image: circleci/golang:1.13.15
   exec_go_1_14:
     docker:
-      - image: circleci/golang:1.14.4
+      - image: circleci/golang:1.14.12
+  exec_go_1_15:
+    docker:
+      - image: circleci/golang:1.15.5
 
 commands:
   fmt:
@@ -25,11 +25,6 @@ commands:
       - run: go get -u golang.org/x/lint/golint
       - run: golint -set_exit_status ./...
       - run: cd _examples && golint -set_exit_status ./... && cd ..
-  install:
-    description: "Install dependencies for go1.12"
-    steps:
-      - run: GO111MODULE=on go mod vendor
-      - run: cd _examples/db && GO111MODULE=on go mod vendor && cd ..
   vet:
     description: "Run go vet"
     steps:
@@ -51,33 +46,18 @@ commands:
     steps:
       - codecov/upload:
           file: "coverage.txt"
-  part1:
-    description: "Part1 include all commands that doesn't need dependencies installed"
+  all:
+    description: "Run all commands against godog code"
     steps:
       - checkout
       - fmt
       - lint
-  part2:
-    description: "Part2 is the all other commands"
-    steps:
       - vet
       - go_test
       - godog
       - coverage
-  all:
-    description: "Run all commands against godog code"
-    steps:
-      - part1
-      - part2
 
 jobs:
-  go1_12:
-    working_directory: /go/src/github.com/cucumber/godog
-    executor: exec_go_1_12
-    steps:
-      - part1
-      - install
-      - part2
   go1_13:
     working_directory: /go/src/github.com/cucumber/godog
     executor: exec_go_1_13
@@ -88,11 +68,16 @@ jobs:
     executor: exec_go_1_14
     steps:
       - all
+  go1_15:
+    working_directory: /go/src/github.com/cucumber/godog
+    executor: exec_go_1_15
+    steps:
+      - all
 
 workflows:
   version: 2
   test:
     jobs:
-      - go1_12
       - go1_13
       - go1_14
+      - go1_15

release-notes/v0.11.0.md

@@ -26,6 +26,9 @@ A lot of the internal code that used to be in the main godog package has been mo
 
 The reason for this is mainly for decoupling to allow for simpler tests and to make the codebase easier to work with in general.
 
+### Added official support for go1.15 and removed support for go1.12 
+With the introduction of go1.15, go1.15 is now officially supported and go1.12 has been removed, this is since godog supports the 3 latest versions of golang.
+
 Non Backward Compatible Changes
 -------------------------------