Fix warnings with task inputs

src/main/java/net/fabricmc/loom/task/AbstractDecompileTask.java

@@ -26,6 +26,7 @@ package net.fabricmc.loom.task;
 
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.OutputFile;
 
 import java.io.File;
@@ -37,10 +38,11 @@ public abstract class AbstractDecompileTask extends AbstractLoomTask {
     private Object libraries;
 
     //@formatter:off
-    @Input public File getInput() { return getProject().file(input); }
+    @InputFile
+    public File getInput() { return getProject().file(input); }
     @OutputFile public File getOutput() { return getProject().file(output); }
     @OutputFile public File getLineMapFile() { return getProject().file(lineMapFile); }
-    @Input public FileCollection getLibraries() { return getProject().files(libraries); }
+    @InputFile public FileCollection getLibraries() { return getProject().files(libraries); }
     public void setInput(Object input) { this.input = input; }
     public void setOutput(Object output) { this.output = output; }
     public void setLineMapFile(Object lineMapFile) { this.lineMapFile = lineMapFile; }

src/main/java/net/fabricmc/loom/task/RemapLineNumbersTask.java

@@ -64,7 +64,7 @@ public class RemapLineNumbersTask extends AbstractLoomTask {
     }
 
     //@formatter:off
-    @Input public File getInput() { return getProject().file(input); }
+    @InputFile public File getInput() { return getProject().file(input); }
     @InputFile public File getLineMapFile() { return getProject().file(lineMapFile); }
     @OutputFile public File getOutput() { return getProject().file(output); }
     public void setInput(Object input) { this.input = input; }

src/main/java/net/fabricmc/loom/task/RemapSourcesJarTask.java

@@ -26,6 +26,7 @@ package net.fabricmc.loom.task;
 
 import net.fabricmc.loom.util.SourceRemapper;
 import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.TaskAction;
 
@@ -42,7 +43,8 @@ public class RemapSourcesJarTask extends AbstractLoomTask {
 	}
 
 	//@formatter:off
-	@Input public File getInput() { return getProject().file(input); }
+	@InputFile
+	public File getInput() { return getProject().file(input); }
 	@OutputFile public File getOutput() { return getProject().file(output == null ? input : output); }
 	@Input public String getTargetNamespace() { return direction; }
 	public void setInput(Object input) { this.input = input; }

src/main/java/net/fabricmc/loom/task/fernflower/FernFlowerTask.java

@@ -134,7 +134,7 @@ public class FernFlowerTask extends AbstractDecompileTask implements ForkingJava
 
     //@formatter:off
     @Input public int getNumThreads() { return numThreads; }
-    public boolean isNoFork() { return noFork; }
+    @Input public boolean isNoFork() { return noFork; }
     public void setNoFork(boolean noFork) { this.noFork = noFork; }
     public void setNumThreads(int numThreads) { this.numThreads = numThreads; }
     //@formatter:on