Add examples for Maven project into README (#281)

This PR adds examples of how the library can be added to the Maven
project as a dependency.

Resolves #280

Author: OptimumCode

Diff for: .github/workflows/release.yml

@@ -129,9 +129,13 @@ jobs:
     - name: Prepare next dev version
       id: prepare_next_dev
       run: |
+        # gradle
         sed -i -e 's/${{ needs.version.outputs.CURRENT_VERSION }}/${{ needs.version.outputs.NEXT_VERSION }}/g' gradle.properties
         sed -i -E -e 's/json-schema-validator((-[a-z]+)?:|\/)[0-9]+\.[0-9]+\.[0-9]+/json-schema-validator\1${{ needs.version.outputs.RELEASE_VERSION }}/g' README.md
         sed -i -E -e 's/json-schema-validator((-[a-z]+)?:|\/)[0-9]+\.[0-9]+\.[0-9]+(-SNAPSHOT)/json-schema-validator\1${{ needs.version.outputs.NEXT_VERSION }}/g' README.md
+        # maven
+        sed -i -e -e 's|<version>[0-9]+\.[0-9]+\.[0-9]+|<version>${{ needs.version.outputs.RELEASE_VERSION }}|g' README.md
+        sed -i -e -e 's|<version>[0-9]+\.[0-9]+\.[0-9]+(-SNAPSHOT)|<version>${{ needs.version.outputs.NEXT_VERSION }}|g' README.md
     - name: Commit next dev version
       id: commit_next_dev
       uses: EndBug/add-and-commit@v9

Diff for: README.md

@@ -40,7 +40,9 @@ from [kotlinx.serialization-json](https://github.com/Kotlin/kotlinx.serializatio
 
 In order to use releases add Maven Central repository to the list of repositories.
 
-##### Kotlin
+##### Gradle
+
+###### Kotlin
 
 ```kotlin
 repositories {
@@ -50,7 +52,7 @@ repositories {
 implementation("io.github.optimumcode:json-schema-validator:0.5.1")
 ```
 
-##### Groovy
+###### Groovy
 
 ```groovy
 repositories {
@@ -68,27 +70,60 @@ implementation("io.github.optimumcode:json-schema-validator")
 _Release are published to Sonatype repository. The synchronization with Maven Central takes time._
 _If you want to use the release right after the publication you should add Sonatype Release repository to your build script._
 
-##### Kotlin
+###### Kotlin
 
 ```kotlin
 repositories {
   maven(url = "https://s01.oss.sonatype.org/content/repositories/releases/")
 }
 ```
 
-##### Groovy
+###### Groovy
 
 ```groovy
 repositories {
   maven { url 'https://s01.oss.sonatype.org/content/repositories/releases/' }
 }
 ```
 
+##### Maven
+
+You can also use `json-schema-validator` as a dependency in your maven project.
+But Maven cannot use Gradle's metadata so you need to depend on a JVM-specific artifact in your project:
+
+```xml
+<dependency>
+  <groupId>io.github.optimumcode</groupId>
+  <artifactId>json-schema-validator-jvm</artifactId>
+  <version>0.5.1</version>
+</dependency>
+```
+
+And you can also add a sonatype repository to your POM file
+
+```xml
+<repositories>
+  <repository>
+    <id>sonatype-release</id>
+    <name>sonatype-release</name>
+    <url>https://s01.oss.sonatype.org/content/repositories/releases/</url>
+    <snapshots>
+      <enabled>false</enabled>
+    </snapshots>
+    <releases>
+      <enabled>true</enabled>
+    </releases>
+  </repository>
+</repositories>
+```
+
 #### Snapshots
 
 _If you want to use SNAPSHOT version you should add Sonatype Snapshot repository to your build script._
 
-##### Kotlin
+##### Gradle
+
+###### Kotlin
 
 ```kotlin
 repositories {
@@ -103,7 +138,7 @@ implementation(platform("io.github.optimumcode:json-schema-validator-bom:0.5.2-S
 implementation("io.github.optimumcode:json-schema-validator")
 ```
 
-##### Groovy
+###### Groovy
 
 ```groovy
 repositories {
@@ -113,6 +148,36 @@ repositories {
 implementation 'io.github.optimumcode:json-schema-validator:0.5.2-SNAPSHOT'
 ```
 
+##### Maven
+
+For the Maven you need to add a snapshot repository to your POM file
+
+```xml
+<repositories>
+  <repository>
+    <id>sonatype</id>
+    <name>sonatype-snapshot</name>
+    <url>https://s01.oss.sonatype.org/content/repositories/snapshots/</url>
+    <snapshots>
+      <enabled>true</enabled>
+    </snapshots>
+    <releases>
+      <enabled>false</enabled>
+    </releases>
+  </repository>
+</repositories>
+```
+
+And then you can add a dependency to a SNAPSHOT version
+
+```xml
+<dependency>
+  <groupId>io.github.optimumcode</groupId>
+  <artifactId>json-schema-validator-jvm</artifactId>
+  <version>0.5.2-SNAPSHOT</version>
+</dependency>
+```
+
 ### Example
 
 If you have just one JSON schema or many independent schemes