Move dependencies to stable version

gradle.properties

@@ -1,7 +1,7 @@
 org.gradle.caching=true
 group=org.ballerinalang
 version=1.0.6-SNAPSHOT
-ballerinaLangVersion=2.0.0-alpha2-SNAPSHOT
+ballerinaLangVersion=2.0.0-alpha2
 ballerinaTomlParserVersion=1.2.2
 commonsLang3Version=3.8.1
 nettyVersion=4.1.50.Final
@@ -18,19 +18,19 @@ unirestVersion=1.4.9
 mimepullVersion=1.9.11
 testngVersion=6.14.3
 
-stdlibIoVersion=0.5.6-SNAPSHOT
-stdlibRegexVersion=0.6.1-SNAPSHOT
-stdlibOsVersion=0.7.1-SNAPSHOT
-stdlibTimeVersion=1.0.7-SNAPSHOT
-stdlibTaskVersion=1.1.6-SNAPSHOT
-stdlibFileVersion=0.6.4-SNAPSHOT
-stdlibCryptoVersion=1.0.6-SNAPSHOT
-stdlibLogVersion=1.0.6-SNAPSHOT
-stdlibMimeVersion=1.0.6-SNAPSHOT
-stdlibCacheVersion=2.0.6-SNAPSHOT
-stdlibAuthVersion=1.0.6-SNAPSHOT
-stdlibJwtVersion=1.0.8-SNAPSHOT
-stdlibOAuth2Version=1.0.6-SNAPSHOT
-stdlibUuidVersion=0.9.2-SNAPSHOT
-stdlibEncodingVersion=1.0.8-SNAPSHOT
-stdlibReflectVersion=0.5.6-SNAPSHOT
+stdlibIoVersion=0.5.6
+stdlibRegexVersion=0.6.1
+stdlibOsVersion=0.7.1
+stdlibTimeVersion=1.0.7
+stdlibTaskVersion=1.1.6
+stdlibFileVersion=0.6.4
+stdlibCryptoVersion=1.0.6
+stdlibLogVersion=1.0.6
+stdlibMimeVersion=1.0.6
+stdlibCacheVersion=2.0.6
+stdlibAuthVersion=1.0.6
+stdlibJwtVersion=1.0.8
+stdlibOAuth2Version=1.0.6
+stdlibUuidVersion=0.9.2
+stdlibEncodingVersion=1.0.8
+stdlibReflectVersion=0.5.6