Add back conj, adjoint, and abs2 for real

Author: YingboMa

src/rulesets/Base/base.jl

@@ -50,6 +50,8 @@
 @scalar_rule(deg2rad(x), π / oftype(x, 180))
 @scalar_rule(rad2deg(x), oftype(x, 180) / π)
 
+@scalar_rule(conj(x), One())
+@scalar_rule(adjoint(x), One())
 @scalar_rule(transpose(x), One())
 
 @scalar_rule(abs(x::Real), sign(x))

test/rulesets/Base/base.jl

@@ -91,6 +91,10 @@
             test_scalar(exp2, x)
             test_scalar(exp10, x)
 
+            test_scalar(conj, x)
+            test_scalar(adjoint, x)
+            test_scalar(abs2, x)
+
             x isa Real && test_scalar(cbrt, x)
         end
     end