Fix lang (#103)

* fix Slovak translation

* fix Basque translation

Author: eumiro

pendulum/lang/eu.py

@@ -4,7 +4,7 @@
     # Days
     'days': {
         0: 'igandea',
-        1: 'asteleehna',
+        1: 'astelehena',
         2: 'asteartea',
         3: 'asteazkena',
         4: 'osteguna',

pendulum/lang/sk.py

@@ -62,7 +62,7 @@
 
     # Relative time
     'ago': 'pred {time}',
-    'from_now': 'za {time}',
+    'from_now': 'o {time}',
     'after': '{time} neskôr',
     'before': '{time} predtým',