Bumped Cabal versions in other Ptolemy cabal files

ptolemy-reader-markdown/ptolemy-reader-markdown.cabal

@@ -7,12 +7,12 @@ license-file:     LICENSE
 author:           Getty Ritter
 maintainer:       gettyritter@gmail.com
 copyright:        ©2016 Getty Ritter
-category: Text
+category:         Text
 build-type:       Simple
-cabal-version:    >=1.0
+cabal-version:    >=1.2
 
 library
+  exposed-modules:     Text.Ptolemy.Markdown.Reader
   ghc-options:         -Wall
   build-depends:       base >=4.7 && <4.9
   default-language:    Haskell2010

ptolemy-writer-html/ptolemy-writer-html.cabal

@@ -9,7 +9,7 @@ maintainer:       gettyritter@gmail.com
 copyright:        ©2016 Getty Ritter
 category: Text
 build-type:       Simple
-cabal-version:    >=1.0
+cabal-version:    >= 1.2
 
 library
 --  exposed-modules:

ptolemy/ptolemy.cabal

@@ -9,7 +9,7 @@ maintainer:       gettyritter@gmail.com
 copyright:        ©2016 Getty Ritter
 category: Text
 build-type:       Simple
-cabal-version:    >=1.0
+cabal-version:    >= 1.2
 
 library
 --  exposed-modules: