Clean up some minor codenarc complaints

gradle/codenarc.rules

@@ -164,7 +164,7 @@ ruleset {
     InconsistentPropertyLocking
     InconsistentPropertySynchronization
     InsecureRandom
-    Instanceof
+    //Instanceof
     IntegerGetInteger
     InterfaceName
     InterfaceNameSameAsSuperInterface
@@ -184,7 +184,7 @@ ruleset {
     JUnitUnnecessarySetUp
     JUnitUnnecessaryTearDown
     JUnitUnnecessaryThrowsException
-    JavaIoPackageAccess
+    //JavaIoPackageAccess
     JdbcConnectionReference
     JdbcResultSetReference
     JdbcStatementReference
@@ -320,7 +320,7 @@ ruleset {
     UnnecessaryPackageReference
     UnnecessaryParenthesesForMethodCallWithClosure
     UnnecessaryPublicModifier
-    UnnecessaryReturnKeyword
+    //UnnecessaryReturnKeyword
     UnnecessarySafeNavigationOperator
     UnnecessarySelfAssignment
     UnnecessarySemicolon

src/main/groovy/com/github/jrubygradle/groovygem/Dependency.groovy

@@ -1,12 +1,13 @@
 package com.github.jrubygradle.groovygem
 
 import com.fasterxml.jackson.annotation.JsonProperty
+import groovy.transform.CompileStatic
 import groovy.transform.TypeChecked
-import sun.org.mozilla.javascript.commonjs.module.Require
 
 /**
  */
 @TypeChecked
+@CompileStatic
 class Dependency {
     @JsonProperty
     String name

src/main/groovy/com/github/jrubygradle/groovygem/Gem.groovy

@@ -58,7 +58,7 @@ class Gem {
     /**
      * Take the given argument and produce a {@code Gem} instance
      *
-     * @param metadata a {@code java.lang.String} or a {@code java.io.File}
+     * @param metadata a {@code java.lang.String}, a {@code java.io.File} or a {@code java.util.zip.GZIPInputStream}
      * @return
      */
     static Gem fromFile(Object metadata) {
@@ -73,13 +73,13 @@ class Gem {
             metadataFile = metadata as File
         }
         else if (metadata instanceof InputStream) {
-            return mapper.readValue(metadata, Gem.class)
+            return mapper.readValue(metadata, Gem)
         }
 
         if (!(metadataFile?.exists())) {
             return null
         }
 
-        return mapper.readValue(metadataFile, Gem.class)
+        return mapper.readValue(metadataFile, Gem)
     }
 }

src/main/groovy/com/github/jrubygradle/groovygem/Requirement.groovy

@@ -1,10 +1,11 @@
 package com.github.jrubygradle.groovygem
 
-import com.fasterxml.jackson.annotation.JsonProperty
+import groovy.transform.CompileStatic
 import groovy.transform.TypeChecked
 
 /**
  */
 @TypeChecked
+@CompileStatic
 class Requirement {
 }

src/main/groovy/com/github/jrubygradle/groovygem/Version.groovy

@@ -1,9 +1,11 @@
 package com.github.jrubygradle.groovygem
 
 import com.fasterxml.jackson.annotation.JsonProperty
+import groovy.transform.CompileStatic
 
 /**
  */
+@CompileStatic
 class Version {
     @JsonProperty
     String version