Update minSdk to 23

The minimum Android SDK version has been updated from 21 to 23.
This change is also reflected in the GitHub Actions CI workflows for Android and KMP, where API levels 21 and 22 have been removed from the test matrices.

Author: softartdev

.github/workflows/android.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        api-level: [ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 ]
+        api-level: [ 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 ]
     steps:
       - name: Check out
         uses: actions/checkout@v4

.github/workflows/kmp.yml

@@ -47,7 +47,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        api-level: [ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 ]
+        api-level: [ 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 ]
         target: [default]
     steps:
       - name: Check out

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 compileSdk = "36"
 targetSdk = "36"
-minSdk = "21"
+minSdk = "23"
 jdk = "17"
 kotlin = "2.1.21"
 ksp = "2.1.21-2.0.2"
@@ -18,7 +18,7 @@ androidSqlCipher = "4.5.4"
 iosSqlCipher = "4.9.0"
 stately = "2.1.0"
 koin-bom = "4.1.0"
-kotlinx-serialization = "1.9.0"
+kotlinx-serialization = "1.8.1"
 kotlinx-datetime = "0.7.1"
 napier = "2.7.1"
 materialThemePrefs = "0.9.7"