Prepare Next Release (#284)

Motivation:
Will introduce breaking change.

Modification:
Set Version 1.3.0

Result:
Version 1.3.0

Author: jchrys

README.md

@@ -14,7 +14,7 @@ Refer to the table below to determine the appropriate version of r2dbc-mysql for
 
 | spring-boot-starter-data-r2dbc | spring-data-r2dbc | r2dbc-spi     | r2dbc-mysql(recommended)     |
 |--------------------------------|-------------------|---------------|------------------------------|
-| 3.0.* and above                | 3.0.* and above   | 1.0.0.RELEASE | io.asyncer:r2dbc-mysql:1.1.0 |
+| 3.0.* and above                | 3.0.* and above   | 1.0.0.RELEASE | io.asyncer:r2dbc-mysql:1.2.0 |
 | 2.7.*                          | 1.5.*             | 0.9.1.RELEASE | io.asyncer:r2dbc-mysql:0.9.7 |
 | 2.6.* and below                | 1.4.* and below   | 0.8.6.RELEASE | dev.miku:r2dbc-mysql:0.8.2   |
 
@@ -61,7 +61,7 @@ However, Docker-certified images do not have these versions lower than 5.5.0, so
 <dependency>
   <groupId>io.asyncer</groupId>
   <artifactId>r2dbc-mysql</artifactId>
-  <version>1.1.0</version>
+  <version>1.2.0</version>
 </dependency>
 ```
 
@@ -71,7 +71,7 @@ However, Docker-certified images do not have these versions lower than 5.5.0, so
 
 ```groovy
 dependencies {
-    implementation 'io.asyncer:r2dbc-mysql:1.1.0'
+    implementation 'io.asyncer:r2dbc-mysql:1.2.0'
 }
 ```
 
@@ -80,7 +80,7 @@ dependencies {
 ```kotlin
 dependencies {
     // Maybe should to use `compile` instead of `implementation` on the lower version of Gradle.
-    implementation("io.asyncer:r2dbc-mysql:1.1.0")
+    implementation("io.asyncer:r2dbc-mysql:1.2.0")
 }
 ```
 

r2dbc-mysql/pom.xml

@@ -19,7 +19,7 @@
 
   <groupId>io.asyncer</groupId>
   <artifactId>r2dbc-mysql</artifactId>
-  <version>1.2.1-SNAPSHOT</version>
+  <version>1.3.0-SNAPSHOT</version>
 
   <name>Reactive Relational Database Connectivity - MySQL</name>
   <url>https://github.com/asyncer-io/r2dbc-mysql</url>

test-native-image/pom.xml

@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>io.asyncer</groupId>
   <artifactId>test-native-image</artifactId>
-  <version>1.2.1-SNAPSHOT</version>
+  <version>1.3.0-SNAPSHOT</version>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>