update pythons and pypy, a little prep for pypy3 in CI again (#3702)

* update pythons and pypy, a little prep for pypy3 in CI again

* slightly renamed

* oops

* pypy renames all around
diff --git a/.travis.yml b/.travis.yml
index 75c306f..f84b419 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,8 +31,8 @@
           env: TOXENV=py35
         - python: 3.6
           env: TOXENV=py36
-        - env: TOXENV=pypy PYPY_VERSION=5.3
-        - env: TOXENV=pypy PYPY_VERSION=5.7.1
+        - env: TOXENV=pypy PYPY_VERSION=pypy2-5.3
+        - env: TOXENV=pypy PYPY_VERSION=pypy2.7-5.8.0
         - python: 2.7
           env: TOXENV=py27 OPENSSL=1.1.0f
         - python: 3.5
@@ -72,7 +72,7 @@
         - language: generic
           os: osx
           osx_image: xcode8.3
-          env: TOXENV=pypy CRYPTOGRAPHY_SUPPRESS_LINK_FLAGS=1 PYPY_VERSION=5.7.1
+          env: TOXENV=pypy CRYPTOGRAPHY_SUPPRESS_LINK_FLAGS=1 PYPY_VERSION=pypy2.7-5.8.0
         - language: generic
           os: osx
           osx_image: xcode8.3
diff --git a/.travis/install.sh b/.travis/install.sh
index 130d30f..ecdecea 100755
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -26,20 +26,20 @@
             pyenv global 3.3.6
             ;;
         py34)
-            pyenv install 3.4.5
-            pyenv global 3.4.5
+            pyenv install 3.4.6
+            pyenv global 3.4.6
             ;;
         py35)
-            pyenv install 3.5.2
-            pyenv global 3.5.2
+            pyenv install 3.5.3
+            pyenv global 3.5.3
             ;;
         py36)
-            pyenv install 3.6.0
-            pyenv global 3.6.0
+            pyenv install 3.6.1
+            pyenv global 3.6.1
             ;;
         pypy*)
-            pyenv install "pypy-$PYPY_VERSION"
-            pyenv global "pypy-$PYPY_VERSION"
+            pyenv install "$PYPY_VERSION"
+            pyenv global "$PYPY_VERSION"
             ;;
         pypy3)
             pyenv install pypy3-2.4.0
@@ -62,8 +62,8 @@
         PYENV_ROOT="$HOME/.pyenv"
         PATH="$PYENV_ROOT/bin:$PATH"
         eval "$(pyenv init -)"
-        pyenv install "pypy-$PYPY_VERSION"
-        pyenv global "pypy-$PYPY_VERSION"
+        pyenv install "$PYPY_VERSION"
+        pyenv global "$PYPY_VERSION"
     fi
 
     # download, compile, and install if it's not already present via travis