Update license headers

Author: Matyrobbrt

Common/src/transform/groovy/io/github/groovymc/cgl/api/transform/codec/ExposeCodecFactory.groovy

@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) 2022 GroovyMC and contributors
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 package io.github.groovymc.cgl.api.transform.codec
 
 import groovy.transform.CompileStatic

Common/src/transform/groovy/io/github/groovymc/cgl/api/transform/codec/ExposesCodecFactory.groovy

@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) 2022 GroovyMC and contributors
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 package io.github.groovymc.cgl.api.transform.codec
 
 import groovy.transform.CompileStatic

Common/src/transform/groovy/io/github/groovymc/cgl/api/transform/codec/WithCodecs.groovy

@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) 2022 GroovyMC and contributors
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 package io.github.groovymc.cgl.api.transform.codec
 
 import java.lang.annotation.ElementType

Common/src/transform/groovy/io/github/groovymc/cgl/impl/transform/codec/ExposeCodecFactoryTransformation.groovy

@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) 2022 GroovyMC and contributors
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 package io.github.groovymc.cgl.impl.transform.codec
 
 import groovy.transform.CompileStatic

Common/src/transform/groovy/io/github/groovymc/cgl/impl/transform/codec/ExposesCodecChecker.groovy

@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) 2022 GroovyMC and contributors
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 package io.github.groovymc.cgl.impl.transform.codec
 
 import groovy.transform.CompileStatic

Common/src/transform/groovy/io/github/groovymc/cgl/impl/transform/codec/ExposesCodecFactoryChecker.groovy

@@ -1,3 +1,8 @@
+/*
+ * Copyright (C) 2022 GroovyMC and contributors
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ */
+
 package io.github.groovymc.cgl.impl.transform.codec
 
 import groovy.transform.CompileStatic