micropython: add micropython component

components/language/micropython/tests/unicode/unicode_subscr.py

@@ -0,0 +1,23 @@
+a = "¢пр"
+
+print(a[0], a[0:1])
+print(a[1], a[1:2])
+print(a[2], a[2:3])
+try:
+    print(a[3])
+except IndexError:
+    print("IndexError")
+print(a[3:4])
+
+print(a[-1])
+print(a[-2], a[-2:-1])
+print(a[-3], a[-3:-2])
+try:
+    print(a[-4])
+except IndexError:
+    print("IndexError")
+print(a[-4:-3])
+
+print(a[0:2])
+print(a[1:3])
+print(a[2:4])