Add rem test case

Author: yisibl

test/fixtures/min-max.css

@@ -10,6 +10,10 @@
 
 }
 
+@media screen and (13.8rem < width <= 51.2rem) {
+
+}
+
 @media screen and (6in < width < 9in) {
 
 }
@@ -34,6 +38,10 @@
 
 }
 
+@media screen and (13.8rem <= height < 51.2rem) {
+
+}
+
 @media screen and (6in < height < 9in) {
 
 }

test/fixtures/min-max.output.css

@@ -10,6 +10,10 @@
 
 }
 
+@media screen and (min-width: 13.801rem) and (max-width: 51.2rem) {
+
+}
+
 @media screen and (min-width: 6.001in) and (max-width: 8.999in) {
 
 }
@@ -34,6 +38,10 @@
 
 }
 
+@media screen and (min-height: 13.8rem) and (max-height: 51.199000000000005rem) {
+
+}
+
 @media screen and (min-height: 6.001in) and (max-height: 8.999in) {
 
 }