Add omitzero for JSON tags

Author: oschwald

.github/workflows/go.yml

@@ -8,7 +8,7 @@ jobs:
     name: Build
     strategy:
       matrix:
-        go-version: [1.23.x, 1.24.x]
+        go-version: [1.24.x]
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:

.golangci.yml

@@ -1,6 +1,6 @@
 version: "2"
 run:
-  go: "1.23"
+  go: "1.24"
   tests: true
   allow-parallel-runners: true
 linters:
@@ -23,6 +23,8 @@ linters:
     - nlreturn
     - nonamedreturns
     - paralleltest
+    # Seems to conflict with golines or one of the formatters.
+    - tagalign
     - testpackage
     - thelper
     - varnamelen

CHANGELOG.md

@@ -16,6 +16,9 @@
 * **BREAKING CHANGE**: Removed `IsAnonymousProxy` and `IsSatelliteProvider` fields
   from all Traits structs. These fields have been removed from MaxMind databases.
   Use the dedicated Anonymous IP database for anonymity detection instead.
+* **BREAKING CHANGE**: Go 1.24 or greater is now required. This enables the use
+  of `omitzero` in JSON tags to match MaxMind database behavior where empty
+  values are not included.
 * Added `IsZero()` method to all result structs (City, Country, Enterprise, ASN,
   etc.) to easily check whether any data was found for the queried IP address.
   Requested by Salim Alami. GitHub [#32](https://github.com/oschwald/geoip2-golang/issues/32).

go.mod

@@ -1,6 +1,6 @@
 module github.com/oschwald/geoip2-golang/v2
 
-go 1.23.0
+go 1.24
 
 require (
 	github.com/quasilyte/go-ruleguard/dsl v0.3.22