Revert version bump

[brnunes-stripe]

Summary

Revert version bump to start release again on a clean state.

Motivation

Release v 20.8.0

[github-actions]

Diffuse output:

OLD: paymentsheet-example-release-master.apk (signature: none)
NEW: paymentsheet-example-release-pr.apk (signature: none)

          │          compressed          │         uncompressed         
          ├───────────┬───────────┬──────┼───────────┬───────────┬──────
 APK      │ old       │ new       │ diff │ old       │ new       │ diff 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
      dex │  15.3 MiB │  15.3 MiB │ +1 B │  51.8 MiB │  51.8 MiB │  0 B 
     arsc │   1.8 MiB │   1.8 MiB │  0 B │   1.8 MiB │   1.8 MiB │  0 B 
 manifest │     4 KiB │     4 KiB │  0 B │  18.5 KiB │  18.5 KiB │  0 B 
      res │ 872.2 KiB │ 872.2 KiB │  0 B │   1.4 MiB │   1.4 MiB │  0 B 
   native │   2.5 MiB │   2.5 MiB │  0 B │   5.9 MiB │   5.9 MiB │  0 B 
    asset │     3 MiB │     3 MiB │  0 B │     3 MiB │     3 MiB │  0 B 
    other │  81.6 KiB │  81.6 KiB │  0 B │ 155.4 KiB │ 155.4 KiB │  0 B 
──────────┼───────────┼───────────┼──────┼───────────┼───────────┼──────
    total │  23.5 MiB │  23.5 MiB │ +1 B │  63.9 MiB │  63.9 MiB │  0 B 

         │          raw           │           unique            
         ├────────┬────────┬──────┼────────┬────────┬───────────
 DEX     │ old    │ new    │ diff │ old    │ new    │ diff      
─────────┼────────┼────────┼──────┼────────┼────────┼───────────
   files │      4 │      4 │    0 │        │        │           
 strings │ 250411 │ 250411 │    0 │ 213499 │ 213499 │ 0 (+5 -5) 
   types │  44187 │  44187 │    0 │  40562 │  40562 │ 0 (+0 -0) 
 classes │  37761 │  37761 │    0 │  37761 │  37761 │ 0 (+0 -0) 
 methods │ 220813 │ 220813 │    0 │ 212846 │ 212846 │ 0 (+0 -0) 
  fields │ 162713 │ 162713 │    0 │ 161674 │ 161674 │ 0 (+0 -0) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  292 │  292 │  0   
 entries │ 6225 │ 6225 │  0

APK

   compressed   │  uncompressed  │                
─────────┬──────┼─────────┬──────┤                
 size    │ diff │ size    │ diff │ path           
─────────┼──────┼─────────┼──────┼────────────────
 2.2 MiB │ +1 B │ 6.8 MiB │  0 B │ ∆ classes3.dex 
─────────┼──────┼─────────┼──────┼────────────────
 2.2 MiB │ +1 B │ 6.8 MiB │  0 B │ (total)

MANIFEST

              │ old                                     │ new                                     
──────────────┼─────────────────────────────────────────┼─────────────────────────────────────────
 package      │ com.stripe.android.paymentsheet.example │ com.stripe.android.paymentsheet.example 
 version code │ 9                                       │ 9                                       
 version name │ 20.9.0                                  │ 20.7.0                                  

@@ -4,3 +4,3 @@
     android:versionCode=9
-    android:versionName=20.9.0
+    android:versionName=20.7.0
     package=com.stripe.android.paymentsheet.example

DEX

STRINGS:

   old    │ new    │ diff      
  ────────┼────────┼───────────
   213499 │ 213499 │ 0 (+5 -5) 
  + 20.7.0
  + AndroidBindings/20.7.0
  + Stripe/v1 android/20.7.0
  + com.stripe:stripe-wechatpay:20.7.0
  + stripe-android/20.7.0
  
  - 20.9.0
  - AndroidBindings/20.9.0
  - Stripe/v1 android/20.9.0
  - com.stripe:stripe-wechatpay:20.9.0
  - stripe-android/20.9.0