Revert "release 4.12.3"

This reverts commit b5bbbd3.

pom.xml

@@ -3,7 +3,7 @@
     <groupId>org.web3j</groupId>
     <artifactId>web3j-maven-plugin</artifactId>
     <packaging>maven-plugin</packaging>
-    <version>4.12.3-SNAPSHOT</version>
+    <version>4.12.3</version>
 
     <name>web3j Maven Mojo</name>
     <description>Mojo's web3j Maven plugin is used to create java classes based on the solidity
@@ -77,9 +77,9 @@
         </dependency>
 
         <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <version>5.10.0</version>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>

src/test/java/org/web3j/mavenplugin/IssueITest.java

@@ -19,13 +19,13 @@
 import java.util.Set;
 import java.util.stream.Collectors;
 
+import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
-import static org.junit.internal.matchers.StringContains.containsString;
 
 public class IssueITest {
 
@@ -164,7 +164,7 @@ public void issue63() throws Exception {
         assertThat("Interface and java classes are generated", files.size(), is(1));
         File file = files.get(0);
         assertThat(file.getName(), is("Greeter.java"));
-        String content = FileUtils.readFileToString(file);;
+        String content = FileUtils.readFileToString(file);
         assertThat(content, containsString("greet()"));
         assertThat(content, containsString("kill()"));
     }

src/test/java/org/web3j/mavenplugin/solidity/SolidityCompilerTest.java

@@ -8,6 +8,7 @@
 import java.util.Collections;
 import java.util.Set;
 
+import static org.hamcrest.CoreMatchers.containsString;
 import static org.junit.Assert.*;
 import static org.junit.Assert.assertThat;
 
@@ -48,7 +49,7 @@ public void invalidContractVersion() {
             solidityCompiler.compileSrc("src/test/resources/", source, new String[0], SolidityCompiler.Options.ABI, SolidityCompiler.Options.BIN);
             fail("Should throw a version mismatch exception.");
         } catch (Exception v) {
-            assertTrue(v.getMessage().contains("No compatible solc release could be found for the file"));
+            assertThat(v.getMessage(), containsString("No compatible solc release could be found for the file"));
         }
     }
 
@@ -60,7 +61,7 @@ public void pragmaVersionTooHigh() {
             solidityCompiler.compileSrc("src/test/resources/", source, new String[0], SolidityCompiler.Options.ABI, SolidityCompiler.Options.BIN);
             fail("Should throw a version mismatch exception.");
         } catch (Exception v) {
-            assertTrue(v.getMessage().contains("No compatible solc release could be found for the file"));
+            assertThat(v.getMessage(), containsString("No compatible solc release could be found for the file"));
         }
     }