chore: various config updates to CI (#322)

.github/workflows/go.yml

@@ -38,7 +38,7 @@ jobs:
     name: Test
     strategy:
       matrix:
-        go-version: [ 1.15.x, 1.16.x, 1.17.x ]
+        go-version: [ 1.13.x, 1.14.x, 1.15.x, 1.16.x, 1.17.x, 1.18.x ]
         platform: [ ubuntu-latest, macos-latest, windows-latest ]
     runs-on: ${{ matrix.platform }}
     steps:

.golangci.yml

@@ -1,4 +1,9 @@
 linters-settings:
+  staticcheck:
+    checks: [
+      "all",
+      "-SA1019" # There are valid use cases of strings.Title
+    ]
   nakedret:
     max-func-lines: 0 # Disallow any unnamed return statement
 
@@ -19,3 +24,4 @@ linters:
     - rowserrcheck
     - unconvert
     - goimports
+    - unparam

README.md

@@ -24,7 +24,7 @@ Package ini provides INI file read and write functionality in Go.
 
 ## Installation
 
-The minimum requirement of Go is **1.12**.
+The minimum requirement of Go is **1.13**.
 
 ```sh
 $ go get gopkg.in/ini.v1

codecov.yml

@@ -4,6 +4,13 @@ coverage:
     project:
       default:
         threshold: 1%
+        informational: true
+    patch:
+      defualt:
+        only_pulls: true
+        informational: true
 
 comment:
   layout: 'diff'
+
+github_checks: false