parse error for prerelease/build

Some string are not parsed correctly.

Adding following code to semverTest() function:

```
local V=
V=1.0.0-beta.1
semverParseInto $V MAJOR MINOR PATCH SPECIAL
echo "$V -> $MAJOR $MINOR $PATCH $SPECIAL"

V=1.0.0+build.1
semverParseInto $V MAJOR MINOR PATCH SPECIAL
echo "$V -> $MAJOR $MINOR $PATCH $SPECIAL"
```

the result is wrong, showing 1.1 instead of 1:

```
1.0.0-beta.1 -> 1.1 0.1 0.1 -beta.1
1.0.0+build.1 -> 1+build.1 0+build.1 0+build.1 +build.1

```