V1.0.11 更新代码：

丘祖桦 · 丘祖桦 · commit 3d927c4f1658 · 2023-08-14T16:52:54.000+08:00
1.兼容最低版本至SDK_21
 2.删除冗余文件
diff --git a/SpannableText/build.gradle b/SpannableText/build.gradle
@@ -6,7 +6,7 @@ android {
     compileSdk 32
 
     defaultConfig {
-        minSdk 26
+        minSdk 21
         targetSdk 32
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
diff --git a/SpannableText/src/main/java/com/johnwa/spannabletext/Calculate.java b/SpannableText/src/main/java/com/johnwa/spannabletext/Calculate.java
diff --git a/app/build.gradle b/app/build.gradle
@@ -7,7 +7,7 @@ android {
 
     defaultConfig {
         applicationId "com.johnwa.demo"
-        minSdk 26
+        minSdk 21
         targetSdk 32
         versionCode 1
         versionName "1.0"
