Raise minimal Gradle version to 7.4

Otherwise we will get (even when configuration cache is disabled):

'Cannot obtain value from provider of FileTextValueSource at
configuration time.
Use a provider returned by 'forUseAtConfigurationTime()' instead.'

Author: jjohannes

README.MD

@@ -1,6 +1,6 @@
 # Gradle Plugin: Java Module Dependencies 
 
-A Gradle 7+ plugin to make Gradle use dependencies from _module-info.java_ files automatically.
+A Gradle 7.4+ plugin to make Gradle use dependencies from _module-info.java_ files automatically.
 If you have a project that fully uses Java Modules, you do **not** need to declare dependencies in the `dependencies { }` block anymore
 (except for _runtimeOnly_ dependencies).
 Gradle will use the information from your `module-info.java` directly.
@@ -118,7 +118,7 @@ dependencies {
 }
 ```
 
-## Define Module versions in a version catalog (Gradle 7.4+)
+## Define Module versions in a version catalog
 
 Alternatively, versions can be defined in the `[version]` block of a [version catalog](https://docs.gradle.org/current/userguide/platforms.html#sub:version-catalog).
 - *Note:* Since `.` is not supported, you need to use `_` as delimiter in the module names.
@@ -253,7 +253,7 @@ extraJavaModuleInfo {
 }
 ```
 
-## Using Gradle's configuration cache (Gradle 7.4+)
+## Using Gradle's configuration cache
 
 This plugin reads all your `module-info.java` files during build configuration.
 This is, because they provide the additional dependency information for setting up the build correctly.

src/main/java/de/jjohannes/gradle/moduledependencies/JavaModuleDependenciesPlugin.java

@@ -44,8 +44,8 @@ public abstract class JavaModuleDependenciesPlugin implements Plugin<Project> {
 
     @Override
     public void apply(Project project) {
-        if (GradleVersion.current().compareTo(GradleVersion.version("7.0")) < 0) {
-            throw new GradleException("This plugin requires Gradle 7.0+");
+        if (GradleVersion.current().compareTo(GradleVersion.version("7.4")) < 0) {
+            throw new GradleException("This plugin requires Gradle 7.4+");
         }
 
         VersionCatalogsExtension versionCatalogs = project.getExtensions().findByType(VersionCatalogsExtension.class);