Implements missing literals for defined?

This PR implements the following literals:

- String
- Symbols
- Integers
- Floats
- Regexs
- Ranges
- Lambdas
- Hashes

and tests for them.

prism_compile.c

@@ -1465,9 +1465,16 @@ pm_compile_defined_expr0(rb_iseq_t *iseq, const pm_node_t *node, LINK_ANCHOR *co
           ADD_INSNL(ret, &dummy_line_node, branchunless, lfinish[1]);
         }
       }
-      case PM_STRING_NODE:
       case PM_AND_NODE:
+      case PM_FLOAT_NODE:
+      case PM_HASH_NODE:
+      case PM_INTEGER_NODE:
+      case PM_LAMBDA_NODE:
       case PM_OR_NODE:
+      case PM_RANGE_NODE:
+      case PM_REGULAR_EXPRESSION_NODE:
+      case PM_STRING_NODE:
+      case PM_SYMBOL_NODE:
         dtype = DEFINED_EXPR;
         break;
       case PM_LOCAL_VARIABLE_READ_NODE:

test/ruby/test_compile_prism.rb

@@ -95,8 +95,16 @@ def test_DefinedNode
       assert_prism_eval("defined? self")
       assert_prism_eval("defined? true")
       assert_prism_eval("defined? false")
+      assert_prism_eval("defined? 1")
+      assert_prism_eval("defined? 1.0")
+      assert_prism_eval("defined? 1..2")
       assert_prism_eval("defined? [A, B, C]")
+      assert_prism_eval("defined? [1, 2, 3]")
+      assert_prism_eval("defined?({ a: 1 })")
       assert_prism_eval("defined? 'str'")
+      assert_prism_eval("defined? :sym")
+      assert_prism_eval("defined? /foo/")
+      assert_prism_eval("defined? -> { 1 + 1 }")
       assert_prism_eval("defined? a && b")
       assert_prism_eval("defined? a || b")