Change analyzer version to 0.24.1-alpha.0 in preparation for publishing.

Change analyzer version to 0.24.1-alpha.0 in preparation for publishing.

The most recently released version of analyzer that we intend to
support is 0.24.0, and there have been no breaking changes since then.
Therefore, assuming no further breaking changes occur, the next
supported version of analyzer will be 0.24.1.

We need to release an unsupported version of analyzer for
analysis_server to depend upon.  Publishing packages with "dev" in
their version string is discouraged (since "dev" means "unpublished"),
so we're going to start using "alpha" for this purpose.  Therefore,
the correct version string for this alpha release is 0.24.1-alpha.0.

Note that three versions of analyzer greater than 0.24.1-alpha.0 have
already been published: 0.25.0-dev.{1,2,3}.  It's not a problem that
we're going "backwards" in version number, because (a) those releases
contain a "-" in their version string, indicating that they are
unsupported, and (b) the minor version should never have been
incremented to 25, since there have been no breaking changes since
0.24.

R=brianwilkerson@google.com, rnystrom@google.com

Committed: https://code.google.com/p/dart/source/detail?r=44868

[Paul Berry, 2015-04-01 20:23:29]

paulberry@google.com changed reviewers:
+ brianwilkerson@google.com

[Paul Berry, 2015-04-01 20:23:29]

Once this CL has landed, I will publish 0.24.1-alpha.0 to pub, and then I will
modify the pubspec for analysis_server to point to version 0.24.1-alpha.0 of
analyzer and version 0.1.7 of dart_style.

[Brian Wilkerson, 2015-04-01 20:31:47]

LGTM

[Bob Nystrom, 2015-04-01 21:12:36]

rnystrom@google.com changed reviewers:
+ rnystrom@google.com

[Bob Nystrom, 2015-04-01 21:12:36]

LGTM! Your explanation sounds spot-on to me.

- bob

[Paul Berry, 2015-04-02 20:01:53]

Committed patchset #1 (id:1) manually as 44868 (presubmit successful).