ghc-text-metrics-0.3.0-bp151.4.2

- Update Cabal build instructions to support ghc-8.6.1.

- Cosmetic: replace tabs with blanks, strip trailing white space,
  and update copyright headers with spec-cleaner.

- Revise cabal build file to specify more accurate dependencies.

- Prefer the new %license attribute over %doc.
- Update Cabal file to revision 2.
  * allow building with recent versions of criterion

- Updated with latest spec-cleaner version 0.9.8-8-geadfbbf.

- Update to version 0.3.0.

- Update to version 0.2.0 revision 1.

- Update to version 0.2.0 with cabal2obs.

- Update to version 0.1.0 revision 0 with cabal2obs.