Bump pgf2 to 1.2.0

src/runtime/haskell-bind/pgf2.cabal

@@ -1,6 +1,6 @@
 name: pgf2
-version: 1.1.0
-synopsis: Bindings to the PGF runtime in C
+version: 1.2.0
+synopsis: Bindings to the C version of the PGF runtime
 description:
   GF, Grammatical Framework, is a programming language for multilingual grammar applications.
   GF grammars are compiled into Portable Grammar Format (PGF) which can be used with the PGF runtime, written in C.
@@ -9,7 +9,7 @@ homepage: https://www.grammaticalframework.org
 license: LGPL-3
 license-file: LICENSE
 author: Krasimir Angelov
-maintainer: Krasimir Angelov, John J. Camilleri
+maintainer: kr.angelov@gmail.com
 category: Language
 build-type: Simple
 extra-source-files: CHANGELOG.md, README.md
@@ -33,15 +33,15 @@ library
   cc-options: -std=c99
   c-sources: utils.c
 
-executable pgf-shell
-  main-is: pgf-shell.hs
-  hs-source-dirs: examples
-  build-depends:
-    base,
-    containers,
-    lifted-base,
-    mtl,
-    pgf2
-  default-language: Haskell2010
-  if impl(ghc>=7.0)
-    ghc-options: -rtsopts
+-- executable pgf-shell
+--   main-is: pgf-shell.hs
+--   hs-source-dirs: examples
+--   build-depends:
+--     base,
+--     containers,
+--     lifted-base,
+--     mtl,
+--     pgf2
+--   default-language: Haskell2010
+--   if impl(ghc>=7.0)
+--     ghc-options: -rtsopts