New go version 1.16 (min)

.github/mergify.yml

@@ -8,7 +8,6 @@ pull_request_rules:
     conditions:
       - -draft
       - author~=^dependabot(|-preview)\[bot\]$
-      - check-success='test (1.15.x, ubuntu-latest)'
       - check-success='test (1.16.x, ubuntu-latest)'
       - check-success='test (1.17.x, ubuntu-latest)'
       - check-success='Analyze (go)'
@@ -22,7 +21,6 @@ pull_request_rules:
   - name: Alert on major version detection
     conditions:
       - author~=^dependabot(|-preview)\[bot\]$
-      - check-success='test (1.15.x, ubuntu-latest)'
       - check-success='test (1.16.x, ubuntu-latest)'
       - check-success='test (1.17.x, ubuntu-latest)'
       - check-success='Analyze (go)'
@@ -40,7 +38,6 @@ pull_request_rules:
       - "#approved-reviews-by>=1"
       - "#review-requested=0"
       - "#changes-requested-reviews-by=0"
-      - check-success='test (1.15.x, ubuntu-latest)'
       - check-success='test (1.16.x, ubuntu-latest)'
       - check-success='test (1.17.x, ubuntu-latest)'
       - check-success='Analyze (go)'

.github/workflows/run-tests.yml

@@ -17,7 +17,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [ 1.15.x, 1.16.x, 1.17.x ]
+        go-version: [ 1.16.x, 1.17.x ]
         os: [ ubuntu-latest ]
     runs-on: ${{ matrix.os }}
     steps:

README.md

@@ -119,7 +119,7 @@ vet                  Run the Go vet application
 
 ## Examples & Tests
 All unit tests and [examples](examples) run via [Github Actions](https://github.com/mrz1836/go-cache/actions) and
-uses [Go version 1.15.x](https://golang.org/doc/go1.15). View the [configuration file](.github/workflows/run-tests.yml).
+uses [Go version 1.16.x](https://golang.org/doc/go1.16). View the [configuration file](.github/workflows/run-tests.yml).
 
 Run all tests (including integration tests)
 ```shell script