Preparing release, fixing Maven build

Author: vsilaev

README.md

@@ -1,4 +1,4 @@
-[![Maven Central](https://img.shields.io/maven-central/v/net.tascalate/net.tascalate.concurrent.svg)](https://search.maven.org/artifact/net.tascalate/net.tascalate.concurrent/0.9.1/jar) [![GitHub release](https://img.shields.io/github/release/vsilaev/tascalate-concurrent.svg)](https://github.com/vsilaev/tascalate-concurrent/releases/tag/0.9.1) [![license](https://img.shields.io/github/license/vsilaev/tascalate-concurrent.svg)](http://www.apache.org/licenses/LICENSE-2.0.txt)
+[![Maven Central](https://img.shields.io/maven-central/v/net.tascalate/net.tascalate.concurrent.svg)](https://search.maven.org/artifact/net.tascalate/net.tascalate.concurrent/0.9.2/jar) [![GitHub release](https://img.shields.io/github/release/vsilaev/tascalate-concurrent.svg)](https://github.com/vsilaev/tascalate-concurrent/releases/tag/0.9.2) [![license](https://img.shields.io/github/license/vsilaev/tascalate-concurrent.svg)](http://www.apache.org/licenses/LICENSE-2.0.txt)
 # tascalate-concurrent
 The library provides an implementation of the [CompletionStage](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletionStage.html) interface and related classes these are designed to support long-running blocking tasks (typically, I/O bound). This functionality augments the sole Java 8 built-in implementation, [CompletableFuture](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html), that is primarily supports computational tasks. Also, the library helps with numerous asynchronous programing challenges like handling timeouts, retry/poll functionality, orchestrating results of multiple concurrent computations and similar.
 
@@ -12,7 +12,7 @@ New name:
 <dependency>
     <groupId>net.tascalate</groupId>
     <artifactId>net.tascalate.concurrent</artifactId>
-    <version>0.9.1</version> <!-- Any version above 0.8.0, the latest one is recommended -->
+    <version>0.9.2</version> <!-- Any version above 0.8.0, the latest one is recommended -->
 </dependency>
 ```
 Old Name
@@ -23,9 +23,6 @@ Old Name
     <version>0.7.1</version>
 </dependency>
 ```
-**IMPORTANT!**
-Don't use release 0.9.0, use [0.9.1](https://github.com/vsilaev/tascalate-concurrent/releases/tag/0.9.1) instead -- the previous one is severely broken, see release notes for 0.9.1.
-
 # Why a CompletableFuture is not enough?
 There are several shortcomings associated with [CompletableFuture](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html) implementation that complicate its usage for real-life asynchronous programming, especially when you have to work with I/O-bound interruptible tasks:
 1.	`CompletableFuture.cancel()` [method](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html#cancel-boolean-) does not interrupt underlying thread; it merely puts future to exceptionally completed state. So even if you use any blocking calls inside functions passed to `thenApplyAsync` / `thenAcceptAsync` / etc - these functions will run till the end and never will be interrupted. Please see [CompletableFuture can't be interrupted](http://www.nurkiewicz.com/2015/03/completablefuture-cant-be-interrupted.html) by Tomasz Nurkiewicz.
@@ -41,7 +38,7 @@ To use a library you have to add a single Maven dependency
 <dependency>
     <groupId>net.tascalate</groupId>
     <artifactId>net.tascalate.concurrent</artifactId>
-    <version>0.9.1</version>
+    <version>0.9.2</version>
 </dependency>
 ```
 # What is inside?

pom.xml

@@ -6,7 +6,7 @@
 
 	<groupId>net.tascalate</groupId>
 	<artifactId>net.tascalate.concurrent</artifactId>
-	<version>0.9.2-SNAPSHOT</version>
+	<version>0.9.2</version>
 	<packaging>jar</packaging>  
 
 	<name>Tascalate Concurrent</name>
@@ -69,7 +69,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-source-plugin</artifactId>
-						<version>3.0.1</version>
+						<version>3.2.0</version>
 						<executions>
 							<execution>
 								<id>attach-sources</id>
@@ -82,7 +82,14 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-javadoc-plugin</artifactId>
-						<version>3.0.1</version>
+						<version>3.2.0</version>
+						<configuration>
+							<jdkToolchain>
+								<version>1.8</version>
+								<vendor>Oracle</vendor>
+							</jdkToolchain>
+							<sourceFileExcludes>module-info.java</sourceFileExcludes>
+						</configuration>	
 						<executions>
 							<execution>
 								<id>attach-javadocs</id>
@@ -156,14 +163,18 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.8.0</version>
+				<version>3.8.1</version>
 				<executions>
 					<execution>
 						<id>default-compile</id>
 						<goals>
 							<goal>compile</goal>
 						</goals>
 						<configuration>
+							<jdkToolchain>
+								<version>12</version>
+								<vendor>Oracle</vendor>
+							</jdkToolchain>
 							<excludes>
 								<exclude>module-info.java</exclude>
 							</excludes>
@@ -181,12 +192,12 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-jar-plugin</artifactId>
-				<version>3.1.1</version>
+				<version>3.2.0</version>
 			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<version>2.22.1</version>
+				<version>3.0.0-M5</version>
 				<configuration>
 					<includes>
 						<include>**/*TestSuite.java</include>