should be >=2.1.8

Author: yyx990803

src/v2/guide/transitions.md

@@ -98,13 +98,13 @@ There are six classes applied for enter/leave transitions.
 
 2. `v-enter-active`: Active state for enter. Applied during the entire entering phase. Added before element is inserted, removed when transition/animation finishes. This class can be used to define the duration, delay and easing curve for the entering transition.
 
-3. `v-enter-to`: **Only available in versions >2.1.8.** Ending state for enter. Added one frame after element is inserted (at the same time `v-enter` is removed), removed when transition/animation finishes.
+3. `v-enter-to`: **Only available in versions >=2.1.8.** Ending state for enter. Added one frame after element is inserted (at the same time `v-enter` is removed), removed when transition/animation finishes.
 
 4. `v-leave`: Starting state for leave. Added immediately when a leaving transition is triggered, removed after one frame.
 
 5. `v-leave-active`: Active state for leave. Applied during the entire leaving phase. Added immediately when leave transition is triggered, removed when the transition/animation finishes. This class can be used to define the duration, delay and easing curve for the leaving transition.
 
-6. `v-leave-to`: **Only available in versions >2.1.8.** Ending state for leave. Added one frame after a leaving transition is triggered (at the same time `v-leave` is removed), removed when the transition/animation finishes.
+6. `v-leave-to`: **Only available in versions >=2.1.8.** Ending state for leave. Added one frame after a leaving transition is triggered (at the same time `v-leave` is removed), removed when the transition/animation finishes.
 
 ![Transition Diagram](/images/transition.png)